Contents Skill area Topic Featured subjects Page Introduction ........................................................................................................................................................................................................ 4 About the Michigan ECPE: Overview − Results − ECPE writing criteria ........................................................................................................ 6 1 Perspectives on personality Introduction Vices versus virtues (and vice versa) A moral primer – Vices and virtues: A sketchy sampler 8 Writing (1) Paragraph development Supporting a topic sentence with generalizations and specific examples 10 Vocabulary (1) It takes all kinds (Part I) Using context clues – Personality portraits A-F – Time out for review 11 Grammar (1) Adjectives: Frequently tested topics Order of adjectives: Mnemonics to the rescue – Adjectives that are not adjectives Vocabulary (2) It takes all kinds (Part II) Personality portraits G-P – Time out for review 17 Cloze A closer look How to handle a cloze passage – Practice: Amelia Earheart: The lady vanishes 21 Grammar (2) Predicate adjectives Using adjectives after stative verbs (predicate adjectives) 24 Vocabulary (3) It takes all kinds (Part III) Personality portraits Q-Z – Time out for review 26 Reading Skimming and scanning The importance of skimming and scanning – Practice: Presidents at gunpoint 30 Writing (2) The importance of clear structure The “Tell Them” prototype – Topic: Early role models 32 Exam practice (1) 15 34 2 Flora and fauna Introduction Biodiversity What on earth is ‘biodiversity’? – Home sweet home – Biodiversity under attack – On the brink 38 Writing (1) Paragraph development Earth Day contest: wildlife threat (jumbled paragraph) 40 Vocabulary (1) The plant kingdom (flora) Our debt to plants – Plant points to ponder – Plants in action – Get the picture? – Itchy eyes, sneezing, and the sex life of flowers – Time out for review 41 Grammar (1) Verb alert! (Part 1) Handling ECPE verb-tense questions – Back to basics: Commandments 1-5 – From theory into practice 45 Vocabulary (2) The animal kingdom (fauna) What’s what and who’s who? – The phylum Chordata – Be fruitful and multiply – A guide to -vores – A picture’s worth a thousand words – Beyond zoology – Time out for review 48 Cloze Reference words Tracking down reference words – Practice: Close encounters of the natural kind 53 Grammar (2) Verb alert! (Part II) Back to basics: Commandments 6-10 – From theory into practice 55 Vocabulary (3) Animal language in action Animal movements – Actions speak louder than words! – Animal idioms 58 Reading Tracking down technical terms Losing your fear of technical writing – Practice: Co-evolution 61 Writing (2) The problem/solution essay Topic: Wildlife at risk: analysis of local problem + steps to correct it 64 Exam practice (2) 66 3 Health and medicine Introduction First day of med school We’ve come a long way, baby! – A sickness by any other name – What’s up, doc? – Time out for review 70 Writing (1) Paragraph development Linking: The power of complex sentence structure 73 Vocabulary (1) Anatomy 101 In the beginning – All systems go! – Other systems in brief 74 Grammar (1) Clauses (Part 1) Noun clauses – Relative clauses – From theory into practice 78 Cloze Easily confused words and word forms Practice (1): Easily confused word forms (Passage: Epidemic in the Sudan) – Practice (2): Easily confused words (Passage: Whooping cough) 81 Vocabulary (2) In sickness and in health ... until death do us part Sicknesses and symptoms – Routine check-up (preposition and particle practice) – Anatomical idioms 84 Grammar (2) Clauses (Part II) Adverbial clauses and related structures – Participle clauses – From theory into practice 87 Vocabulary (3) Daunting developments The conquest of disease – Diagnostic technology – Surgical advances – Reproductive medicine – Time out for review 90 Reading Visualizing metaphors Practice (1): Drug abuse – Practice (2): Commando viruses to the rescue 93 Writing (2) The “for and against” essay Topic: Genetic engineering 96 Exam practice (3) 2 98 Contents Skill area Topic Featured subjects Page 4 Environmentalism 101 Introduction In the beginning ... The biosphere and the forces that have helped to shape it – In praise of erosion: Waxing eloquent in Nevada’s Valley of Fire – Enter Homo sapiens ... 102 Writing (1) Paragraph development Writing introductions – Which is better: objective or imaginative? 107 Vocabulary (1) Pandora’s box Global warming – Declining air quality – Declining water quality – Time out for review 108 Grammar (1) Emphatic structures: Inversion Inversion with negative adverbials and so/such – Inversion in emphatic conditionals – From theory into practice 112 Vocabulary (2) Disasters wrought by nature Kobe earthquake – Volcanoes, melting glaciers, and flooding in Iceland – Hurricanes Andrew and Katrina – Time out for review 114 Cloze Finding “missing links” in a writer’s train of thought – Practice (1): Establishing relationships within short contexts – Practice (2): Finding missing links in a text analyzing cause and effect 117 Linking words Vocabulary (3) Disasters wrought by man Chernobyl – Mumbai’s urban nightmare – Sea of Japan oil spill – Time out for review 120 Grammar (2) The subjunctive and other message-intensifying phrases The subjunctive mood – Common colloquial intensifiers Reading Coping with texts that describe a process How to handle process descriptions – Practice: What’s an El Niño? Writing (2) The opinion essay Acknowledging the complexity of an issue – Topic: Pesticides 123 125 128 Exam practice (4) 130 5 Technological transitions Introduction Technology and innovation What is technology? – What drives technology forward? – Ingenious 19th-century innovations – Techno adjectives for a brave new world Writing (1) Paragraph development The importance of mechanics 137 Vocabulary (1) 20th-century milestones Mass production – Radar – Laser – Integrated circuits – Time out for review 138 Grammar Gerunds and infinitives Handling ECPE questions with gerunds and infinitives – From theory into practice 141 Vocabulary (2) Techno buzz words Interlocking revolutions – High-tech computer spin-offs – Time out for review 144 Cloze Parallel structure Dealing with cloze items testing parallel structure – Practice: Robo-revolution 147 Vocabulary (3) Other hot techno themes Food technology and the Green Revolution – Medicine and biotechnology – Time out for review 150 Reading Coping with typical ECPE techno passages Characteristics of typical ECPE techno passages and questions – Practice: Seeing is believing (past ECPE techno extracts) 153 Writing (2) Time management Developing a time-management approach to ECPE writing – Topic: Automation Exam practice (5) 134 156 158 Grammar reference .......................................................................................................................................................................................... 162 ECPE? Follow m e! 3 3 Health and medicine Introduction First day of med school Α We’ve come a long way, baby! − The purpose of the text below is not only to introduce you to the early history of medicine, but also to remind you that you can usually understand the gist (or general meaning) of what the writer is saying without understanding every single word. STEP 1: Skim through the text in the blue box. Then circle the choice that best sums up the main idea: a)Early humans were surprisingly bad at treating and preventing illness. b) Before the 5th century B.C., little was known about the real nature of disease. Medicine has come a long way since prehistoric times, when early humans attributed most diseases to the influence of malevolent demons who entered the body of unsuspecting victims. Paleopathologists have found evidence indicating that preventive medicine in those days involved the use of magic, dancing, and lucky charms to ward off evil spirits. If demons did manage to enter the body, then efforts were made to render it uninhabitable by beating, torturing, or starving the patient. Attempts were also made to expel demons by using potions that induced violent vomiting or by drilling a hole in the skull from which a demon could be driven out. Not surprisingly, such therapies had limited success, but to their credit our Neolithic ancestors were better at dealing with wounds and fractured bones. Limited progress was made by the Egyptians and other Mesopotamian cultures, but the real breakthrough was made by the Greek physician Hippocrates in the 5th century B.C. Challenging the idea that disease was punishment sent from the gods, he is believed to have been the first to suggest a connection between disease and unsanitary environmental conditions such as poor water and food quality. STEP 2: Read through the text again, and scan for the answers to the questions below. As you read, circle any unfamiliar words, but don’t worry about them yet. Focus only on finding the details you need to answer the questions. 1. In the view of our early ancestors, what was the cause of most diseases? 2. List 3 ways that the ancients tried to prevent illness and 5 methods of treatment. Prevention: Treatment: 3. What important contribution did Hippocrates make in the 5th century B.C.? STEP 3: Now read the text again and find the words that correspond to the meanings below. (The meanings reflect the order in which the words appear in the text. For verbs, use the base form.) a. – say (sth) is caused by g. – magical drinks or liquids b. – evil, intending harm h. – produce, cause, bring about c. – keep away, turn aside i. – broken d. – make, cause to become j. – important development e. – not fit to live in k. – doctor f. – force to leave, drive out l. – unclean and unhealthy 70 3 Health and medicine B A sickness by any other name – Use the words in the box to fill in the blanks. Some are very close in meaning, but don’t give up: items 1, 3, 6, and 7 contain clues that will help you start to work things out. affliction ailment disability disease disorder illness impairment 1. The word is an uncountable noun meaning “the condition of being ill (i.e., not in good health)”: e.g., If your son shows signs of ~, take him to a doctor. Mental ~ is a taboo subject for many people. It can also be used as a countable noun to refer to a period of ill health: e.g., He died after a prolonged ~. 2. A(n) is a specific illness such as influenza or chicken pox or a condition involving the improper functioning of an organ or system: e.g., ~s like hepatitis and asthma, a heart/lung ~. 3. The word is used for an illness that is not very serious (e.g., the common cold); it derives from ail, which means “to trouble in body or mind”: e.g., “What’s ~ing you?” 4. A(n) is a disturbance of the normal workings of the body or mind: e.g., a rare nerve ~, an eating ~. 5. The word refers to an injury, illness, or condition that restricts the way a person lives: e.g., paralysis is a physical ~, dyslexia is a learning ~. 6. When one’s speech, hearing, or sight has been damaged but not totally destroyed, the word used: e.g., a speech ~. It derives from impair, meaning “to damage or weaken.” is 7. is a formal word meaning “something that causes great physical or mental suffering”: e.g., AIDS is a terrible ~. It derives from the verb afflict, which is often used passively to mean “suffer from”: e.g., She is afflicted with diabetes. C What’s up, doc? – The meaning of most of the words in the green boxes below will already be familiar to you. Discuss them, and then use them to complete the two texts. diagnose fatigue fever fracture A doctor’s ability to (1) (2) rash swelling symptoms tenderness (or identify) a disease depends on an accurate recognition of its (signs of illness). These may range from signals such as pain, (3) (higher than normal body temperature), (4) (extreme tiredness), or (5) (soreness) of muscles or organs to visible signs such as a (6) (red spots on the skin) or (7) (enlargement). X-rays and routine lab tests may turn up a wide variety of other problems, such as a bone (8) (break) or changes in the cells, nerves, or blood that can only be detected with the aid of a microscope. alleviate anesthetize cure inject operate prescribe preserve set stitch treat New doctors must take the Hippocratic Oath, a promise that they will do their best to (9) (reduce, lessen) suffering and (10) (maintain) life. Doctors can (11) (give medical care to) their patients in a variety of ways, but there is no guarantee that they will (12) everyone (bring about a full recovery). If the problem is minor, they can (13) (recommend the use of) medication or use a syringe to (14) you with antibiotics. If you cut yourself deeply, they can (15) your leg or arm is broken, they can (16) (sew) up the wound. If it (put it back in place) and immobilize it in a plaster cast. If the problem is more serious, they may be forced to (17) unconscious) and (18) you (make you (perform surgery). 71 3 Health and medicine Time out for review First day of med school Α “Prosthetic” surgery (verbs ➝ nouns) – Change each verb to a noun by “adding on” one of the noun suffixes in the box and making other spelling changes as necessary. Then use ten of the nouns to complete sentences 1-8. -ability -ation -ing -is -ment -sion -tion ail– afflict – preserve – expel – impair – diagnose – treat – starve prescribe – swell – prevent– – disable – 1. Both of his legs were crushed in the accident, leaving him with a permanent 2. Since the explosion, she’s suffered from a serious hearing . . 3. Look at your finger! It’s twice the size it usually is. What caused the 4. His refusal to study resulted in his ? from medical school. 5. In the United States, you can buy medicines for common to get a from your doctor. s (e.g., colds or the flu) without having 6. My family doctor is fond of saying that is by far the best for disease. 7. Doctors sometimes face a difficult moral dilemma. Which should be their higher priority: the alleviation of suffering or the of life? 8. The civil war in this poor African nation is a terrible many villagers will die of . . If food supplies don’t reach the area soon, B Medical mix and match – In part 1, pair up the adjectives and nouns to fill in the blanks with common adjective + noun combinations. In part 2, pair up the verbs and nouns. 1. Adjectives fractured learning preventive prolonged routine Nouns bones disability examination illness medicine a. There’s nothing wrong. She’s just seeing her physician for a . b. The writer died after years of suffering from a . c. Dyslexia is a common . d. X-ray technicians frequently deal with patients who have e. The goal of 2. . is to avoid disease by promoting strategies for healthy living. Verbs alleviate diagnose induce perform take Nouns an oath disease pain surgery vomiting a. Modern imaging techniques such as CAT scans and MRIs enable doctors to much more accurately than they could in the past. b.New doctors must in which they promise to do their best to and suffering. c. If you suspect that someone has accidentally swallowed poison, call the Poison Center immediately. Do not unless a qualified person tells you to do so. d. The Smiths were relieved when the surgeon told them it would not be necessary for him to on their year-old infant. 72 Health and medicine Writing (1) 3 Paragraph development SKILLS FOCUS Linking: The power of complex sentence structure In addition to assessing your ability to organize and develop your ideas in a series of well-structured paragraphs, ECPE examiners will also be looking for evidence of your ability to use a range of complex sentence structures. This section will give you practice in combining simple ideas into complex sentences. It will also remind you of some of the structures you can use to make your writing richer and more varied. How can I link thee? Let me count the ways ... Warm-up − In pairs, combine each set of sentences into one sentence. Then compare answers with several other pairs. Discuss the different solutions and decide whose is the most effective. What structures did you use to combine your ideas? 1.The first category includes certain diseases. Some of these are pneumonia, cholera, AIDS, and influenza. These are caused by microscopic organisms. The microorganisms are known as germs. The first category includes 2.Sometimes a disease can be “communicated” or passed from one person to another. This kind of disease is known as a communicable disease. When a disease 3.There is another word. It is commonly used to describe such diseases. The word is contagious. It means “catching” or “able to be spread by direct or indirect contact.” Another word Α Try it! − On notebook paper, combine the simple sentences below into a paragraph with fewer, but more complex sentences. When you finish, compare answers with several other students, and decide whose answer is most effective. There is the second large category. It includes diseases. Some of these are cancer, diabetes, cirrhosis, and heart disease. There are also others. They are not caused by living organisms. They are known as non-infectious disease. They are now the leading cause of mortality (or loss of life) in the industrialized world. Not all causes of these diseases are known. Scientists have found out some things. Some can be traced to long-term exposure to harmful substances. These substances are found in the workplace or environment. Here is an example. Miners breathe in coal dust. They do this for many years. They may develop a disease. It is called “black lung.” Other diseases may stem from another thing. It is known as “harmful lifestyle.” The following is now widely accepted. Smoking, alcohol, overeating, lack of exercise, and stress are harmful habits. They make people susceptible to a wide range of chronic and potentially fatal disorders. Asking for troubl e ... Analyze it! − Look at your work and see if you used any of the following. If not, what other structures did you use? B compound sentence impersonal passive noun clause pronoun reference relative clause reduced participle clause prepositional phrase 73 3 Health and medicine Vocabulary (1) Anatomy 101 Warm-up – In pairs or small groups, discuss the questions, and then share your answers with the class. 1. How does human life begin and what happens as the single-celled life starts to develop in its mother’s body? 2. What do you know about DNA, genes, and chromosomes? Α In the beginning – Read the two texts below. Then match the boldfaced words with their meanings. 1. Human life is the sum of many individual cells organized in specific ways. It begins with fertilization, when the nucleus of a sperm cell combines with the nucleus of an ovum (or egg). The result is a zygote, a single cell that contains hereditary (or genetic) material from both parents: 23 pairs of chromosomes, each of which consists of a single, long, thin, twisting bit of DNA. DNA is an amazingly complex chain of chemicals that is uniquely different in each and every living thing. This is because the genes that we inherit from our parents are incorporated into the DNA molecule that makes up each chromosome. How the zygote develops is determined by the unique combination of genes that are in its DNA. It’s as if the genes carry with them a detailed genetic “blueprint” (or building plan) that controls what happens at every stage of the new organism’s development. a. – deoxyribonucleic acid f. – baby “starter” cell b. – small unit of living matter g. – conception, start of new life c. – female reproductive cell h. – central part of cell d. – male reproductive cell i. – inherited, passed on e. – thin structures of DNA that j. – subunits of DNA that contain carry genetic information inherited characteristics 2. A bout thirty hours after conception, the single-celled zygote divides into two cells, which divide into four, then eight, and so on until a hollow ball of cells called a blastula is formed. The blastula attaches itself to the wall of the mother’s uterus, where it continues to develop: first into an embryo and later into a fetus, until it is born as a human infant nine months later. Development within the uterus occurs in the amniotic sac, through which the embryo receives nourishment from its mother’s body via the umbilical cord. The process is nothing short of miraculous. Following the blueprint in the genes, the new cells are like “do it themselves” building blocks. By the second week, they have already formed into groups and become specialized units known as tissues, from which the skin, bones, nerves, muscles, blood, and other parts of the body will form. By the end of the first month, all major organs have begun to develop. The eyes are visible, arms and legs have begun to bud, and the heart has already begun to beat. a. – baby – early prenatal1 phase b. – baby – later prenatal phase c. – baby – birth to two years d. – food needed for growth e. – specialized masses of cells f. – organ in which baby develops g. – sac in (f) where baby develops h. – what “ties” baby to mother 1 74 – before birth c. mniotic sa Fetus in a l cord? e umbilica h t e e s u o Can y Health and medicine 3 B All systems go! – This section is designed to acquaint you with the major systems and organs of the body so they come as no surprise if you encounter them on an exam. Warm-up – Work in pairs or small groups, and then share your answers with the class. 1.Without looking at the texts in this section, make a list of the vital organs you know in English. What function does each one perform? 2. Describe some of the systems that help the body function. Which do you find most fascinating? As you work through the texts on pages 75-77, use a word from the box to fill in the name of each system. Then label the diagrams with the boldfaced words. (You may want to write equivalents in your own language next to the English labels.) circulatory digestive muscular nervous 1. The system provides the body with support and protection of its vital organs and the system enables us to move. The adult human skeleton is composed of 206 bones that are bound together by tough bands of tissue called ligaments. The places where bones join together are known as joints. Movement depends on the contraction (or tightening) of the skeletal muscles, which are attached to the bones by tendons. The bones are filled with a fatty substance called bone marrow, where red and white blood corpuscles (cells) are produced. respiratory skeletal b. a. e. a. 2. The system is a vast network in which billions of neurons (or nerve cells) in the brain communicate with millions more in the rest of the body to transfer sensory impressions, control muscle movement, and regulate involuntary processes such as heartbeat, breathing, digestion, and hormone production. The system is divided into two subsystems: the central nervous system (consisting of the brain and spinal cord) and the peripheral nervous system (which extends throughout the body). The three main areas of the brain are: the cerebrum (or forebrain, which includes the cerebral cortex or brain surface); the brain stem (midbrain); and the cerebellum (hindbrain). b. d. c. f. 75 3 Health and medicine 3. The (or cardiovascular) system serves a dual purpose: first, to circulate oxygen-rich, nutrient-laden blood to all parts of the body and, second, to carry carbon dioxide (CO2) and other waste away from the cells. The system includes: the heart, a four-chambered muscular organ that pumps blood through the system; the lungs, or breathing organs, which filter CO2 from the blood and replace it with oxygen; and a complex network of blood vessels through which the blood flows. The latter consists of arteries, which carry oxygen-rich blood away from the left side of the heart; veins, which carry oxygen-poor blood back to the right side of the heart, where it is sent to the lungs for oxygenation; and tiny, hair-like capillaries that connect the arteries and veins. ➝ ➝ a. b. c. d. 4. T he system is responsible for breathing. Air is sucked into the nose and mouth and down through the trachea (or windpipe), which divides into two long, hollow tubes called bronchi (plural of bronchus), which extend into the lungs. Inside each lung, the bronchus branches out into smaller and smaller tubes called bronchioles, which end in small air balloons known as alveoli (plural of alveolus). These are surrounded by tiny blood vessels known as capillaries, through which oxygen enters the blood and carbon dioxide is removed. Inhalation (breathing in) and exhalation (breathing out) are controlled by the diaphragm, a large muscle under the lungs. a. b. a. c. b. c. d. d. e. e. f. f. g. g. 76 Health and medicine 3 5. The system breaks food down so it can be absorbed by the body’s tissues. The process begins in the mouth, where food mixes with saliva from the salivary glands and is broken up by the teeth and tongue. After it is swallowed, the food travels down the esophagus to the stomach, where it is acted on by gastric acid. It then passes into the small intestine, where much of it is absorbed into the blood. Other organs help out by producing chemicals called enzymes that flow into the small intestine: the liver (a large organ on the right side of the abdominal cavity that produces bile, which breaks down fats); the gall bladder (a small sac under the liver, which stores bile until it is needed); and the pancreas, which produces fluids that break down protein, fat, and starches. Unabsorbed food passes into the large intestine, where water and minerals are absorbed into the blood. The remaining solid waste exits the body through the rectum. a. b. c. d. e. f. C Other systems in brief – Match the words in the box with the descriptions endocrine system immune system reproductive system urinary system a. –helps the body defend itself against antigens (disease-causing germs). Includes various white blood cells, such as phagocytes and macrophages (which surround lymphocytes, which make antibodies). b. –relieves the body of liquid waste known as urine via the bean-shaped filters called kidneys and the bladder (a muscular organ that stores urine until it is ready to be expelled). c. –secretes hormones into the blood by means of chemical-producing sacs called glands. Included are the pancreas and glands such as the pituitary, thyroid, and adrenals. d. –enables the body to produce new life (see page 74 for more information). 77 3 Health and medicine Grammar (1) Clauses (Part I) Α Noun clauses – A noun clause always acts as part of a main clause. It functions in one of these ways: How a patient will react is of great concern to the doctor. as subject as complement The real test is whether or not he’ll listen to the doctor. It seems/appears (that) the patient will live. as object of a verb I believe (that) he’s putting his health at risk. We just don’t understand why people continue to smoke. as object of a preposition She’s afraid of what the doctor is going to say. after opinion adjectives I’m sure (that) the doctor will be here soon. He’s afraid (that) his injuries are serious. in reported speech He said (that) he would have to operate. She asked me where the pain was. Links Notes that, how, however, if/whether/whether or not, what, when, where, which, who, why, whatever, whenever, whichever, whoever 1.Subject noun clauses are singular and require a verb in the third-person singular. Exception: sentences with compound subjects (see examples on blackboard). 2.Many of the linking words used with noun clauses are question words, but the structure remains: link + subject + verb. In other words, there is no need for inversion. was 1.What I asked him were confidential. ^ are Where I went and what I did is not your concern. ^ s 2.I don’t understand why does he keep on doing that. ^ How will a patient react is of great concern to a doctor. I’m worried about what will she do when she finds out. Practice 1 – Underline the errors and make corrections on the right, as needed. 1. Did she say was he in which hospital? 2. I wonder does he know a good pediatrician? 3. Who told you that were they seriously mistaken? 4. What does he say and what does he do are two different things! 5. I’d like to know what doctor did you see. 6. It’s unclear how long has he been ill. Practice 2 – Underline the noun clause in each sentence. Then choose the correct linking word. 1. I promise to do exactly 2. the doctor says. the doctor suggests is all right with me. 3. Can they explain the patient died so suddenly? that – what – whatever – how That – When – Whatever – How whether – what – that – why 4. she’s still alive is something of a miracle. That – However – If – That which 5. you begin treatment is up to you. Is next week OK? However – Whatever – That – When 6. It’s not clear 78 they are going to operate or not. when – whether – where – that Health and medicine 3 B Relative clauses – A relative clause describes a noun or pronoun, and is positioned directly after the word it describes. It may also serve as the object of a prepositional phrase that relates back to a noun or pronoun. A relative clause is linked to the word it modifies by means of a relative pronoun or a relative adverb (see “Links” below). There are two main types: •The defining relative clause provides information that is essential to the meaning of the noun or pronoun it modifies. It is never set off with commas. For example: Dr. Smith was the surgeon who/that performed the heart transplant. The doctor whom/who/that you recommended is excellent. She saved a patient whose kidneys were failing. That’s the hospital where I was born / in which I was born / (that/which) I was born in. •The non-defining relative clause provides information that is extra and not essential to the meaning of the word it modifies. It is always separated from the main clause by commas. For example: The AIDS epidemic, which once affected mainly gay people, has spread to heterosexuals. Mary, whose sister is a cardiologist, has decided to specialize in orthopedics. The two men, both of whom are gynecologists, are close friends. Links Notes Relative pronouns For people: who, that, whom, whose For things/animals: which, that, whose Relative adverbs when, where, why 1. That can be used instead of who, whom, or which, but it is never used after commas or prepositions. 2. Whom (for people) and which (for things) must be used after a preposition. 3.When a relative pronoun acts as the subject of a relative clause, the clause cannot have a second subject. who 1. Ann Lee, that lives on my block, is a nurse. ^ whom 2. She’s the doctor on who I depend. ^ 3. ItwasDr.Smithwhoheperformedtheoperation. He’s afflicted with a disease that it has no cure. Practice – Underline the word or phrase that best completes each sentence. 1. The patient was waiting for a heart transplant. 2. The disease, once in decline, is now back in full force. 3. That’s Dr. Green, in charge of the Emergency Room. 4. She’s a doctor 5. The pills you can put your complete trust. prescribed for me have terrible side-effects. died – which died – that he died – who died that was – which it was – which was – it was whose – whose wife is – his wife is – who he is that – whom – in whom – in who who were – she – whom she – which 6. The woman you are speaking is a pediatrician. that – who – to who – about whom 7. The disease suffers from is incurable. from which he – which he – that he is – that 8. Psoriasis is a skin disease is unknown. 9. Ten cases were reported, seven 10. He’s the patient were fatal. Dr. Casey operated. its cause – the cause – whose cause – which whose – in whom – which – of which on whom – that – on which – whose 79 3 Health and medicine C FROM THEORY INTO PRACTICE – Now let’s look beyond the basics and see how noun clauses and relative clauses might be tested on the exam. For items 1-12, circle the correct choice (a-d). Noun clauses – Expect a range of questions testing topics such as: appropriate tense in a that clause (especially after modals or wishes); word order with noun clauses introduced by interrogative words; clauses with if/whether and equivalent structures; and noun clauses as subjects in long complex sentences. Also expect questions to contain wrong choices based on alternative structures (e.g., with gerunds or infinitives). 1. He ought to admit the window. a. he broke c. he break b. that he breaks d. him breaking 2. The report showed to smoke. a. how is it risky c. that it is how risky b. how risky it is d. that how it is risky 3. “Did the physical therapist give you exercises for your back?” “Not yet, but she told me .” a. not what to do c. that I shouldn’t do b. not what I should do d. what I shouldn’t do. 4. a vacation this year depends on how much money I save. a. If I don’t take c. Whether or not I take b. Should I not taked. To take 5. We couldn’t decide to the party or stay home. a. whether we should go c. whether we go b. if we went d. between going 6. You should call him you want to or not. a. even if c.either b.whether d. in case Relative clauses – Common question types range from simple items that test a missing relative pronoun or adverb with or without a preposition (e.g., who, to whom, whose, in which, where) to more complex items that test both structural and lexical issues. 7. Ann Baxter is the name of the doctor son I live next door to. a. that her c. to whose b. whose d. whom her 8. “Can you apply for the nursing program at any time?” “No, there’s a special date your application must be submitted.” a. when byc. in that b. at which d. by which 9. I’ve read a lot of articles lately, the most interesting a. of which c. of that b.that d.it was about new cancer treatments. 10. Bob just graduated medical school, no one else in our family has ever done. a. that c.which b. who d. from which 11. The hospital has hired ten new lab technicians, just finished college. a. who most had c. the most of them had b. most of whom have d. that most have 12. One issue that is the reappearance of diseases like malaria and smallpox. a. it is concerning us c. concerns us b. is concerned about d. it is of concern to us 80 Health and medicine Cloze 3 Easily confused words and word forms ECPE multiple-choice cloze questions often ask you to distinguish among words and word forms that are easily confused with each other. For example: •At sentence level, you may be asked to choose among different forms of the same word (e.g., cure – curative – curable – incurable or decimated – decimate – decimation – decimating) or words that are similar in meaning but collocate with different prepositions and/or verb structures (e.g., afflicted with vs. suffer from or capable of doing vs. able to do). •At discourse level, you may be asked to choose among words with closely related meanings (e.g., treatment – remedy – cure or rise – arise – arouse) or words that sound or look somewhat alike but have different meanings (e.g., infect – infest – invest). You may also have to discriminate among phrasal verbs or collocations to see which best fits the context. You can maximize your chances of answering such questions correctly by following a few simple rules. SKILLS FOCUS Tackling easily confused words and word forms Always take the time to analyze the choices and the context surrounding each blank to determine whether you are being tested at the sentence level or discourse level. At sentence level: w Always check to see what part of speech is missing. This is particularly important if you are asked to choose between different forms of the same word. Eliminate any choices that are obviously wrong. Then study the context carefully to make sure the meaning of the form you choose is logical and appropriate. w Note whether or not a preposition follows the blank. If it does, then make sure your choice agrees with it. Test-makers frequently test collocations (or set phrases) with this type of question. At discourse level: w Try to predict the meaning of the missing item. You can do this by studying the surrounding context. w Use the context and what you know to rule out any obviously wrong choices. Of course, there’s no “better medicine” than knowing what all the choices mean. But if you do come across unknown phrasal verbs or other lexical items in the choices, then there is nothing wrong with narrowing down the choices based on knowledge that you do have and then making an educated guess. Each choice you can rule out improves your chance of answering correctly by 25%! Part of speech? Don’t panic! Preposition after the blank? Obviously wrong choices? Which one? Which choices can be ruled out? 81 3 Health and medicine Α CLOZE PRACTICE (1): Easily confused word forms STEP 1: Skim the text without looking at choices 1-5. Then answer the following questions. 1. What problem do villagers in southern Sudan face? 2. How does the current situation compare to the situation during the 1980s? STEP 2: Now work through the text. Use hints 1-5 to help you narrow down your answers. Droves of villagers throughout Western Equatorial Southern Sudan are being screened and entered into treatment for sleeping sickness by doctors and nurses from the International Medical Corps. An estimated 12,000 people in the Tambura region are __(1)__ with sleeping sickness, and hundreds of thousands more are at extreme risk of contracting the potentially __(2)__ parasitic disease from infected tsetse flies. Since October 1997, treatment and __(3)__ efforts have been focused on the town of Ezo in southern Sudan, the presumed epicenter of this recent __(4)__ of sleeping sickness. The disease has remained uncontrolled since 1989 when civil war in Sudan forced the __(5)__ of a Belgian healthcare team who had been working for almost ten years to eradicate it. 1.a. suffering c.afflicted b. suffered d.afflicting 2.a. fatality c.deathly b. fatalistic d.deadly 3.a. eradicated c.eradicable b. eradicate d.eradication 4.a. resurgence c.stimulated b. resurgent d.stimulation 5.a. withdrew c.withdrawn b. withdrawal d.withdraw Hints 1. Note the with after the blank and the fact that you’re being asked to choose between the -ed and -ing forms of two different verbs. Also note the are before the blank. Now ask: • Which two choices collocate with from and can thus be ruled out? • Which of the others fits the context: the active -ing form or the passive -ed form? 2. Careful! An adjective is needed to complete the phrase potentially ... parasitic disease, but two of the choices look like adverbs as they end in -ly. Before you panic, remember that some adjectives do end in -ly (daily, monthly, etc.). Consider the following: • Which is clearly a noun and should be ruled out? • Which means “pessimistic” and should be ruled out? • Which means “fatal, likely to cause death” and thus fits the context? 3. Logically you’re looking for an adjective (or perhaps a noun that acts as an adjective) to collocate with the word efforts. That rules out the verb eradicate (meaning “totally destroy, put an end to”). Try writing definitions for the phrases below, and choose the one that logically suits the context. • eradicated efforts – • eradicable efforts – • eradication efforts – 4. Review your answers to the questions in Step 1. Then consider the following: • What part of speech is needed to complete the prepositional phrase before the blank? • Which two choices can you rule out? • Which of the others implies a sudden strong reappearance of an old problem? 5. What part of speech is needed in the blank? Which three choices can automatically be eliminated? 82 Health and medicine 3 B CLOZE PRACTICE (2): Easily confused words This exercise contains discourse-level questions that test vocabulary. Finding the right answers depends not only on your ability to discriminate among the meanings of the four choices but also on your ability to understand the text well enough to determine the meaning that is required in each blank. STEP 1: Skim the text without looking at choices 1-6. Then answer the following questions. 1. Why is it that whooping cough is not the “killer childhood disease” that it once was? 2. Why does it now affect so many adults? STEP 2: Now work through the text. Before choosing an answer, match each choice to its meaning in the hints below. Then check the surrounding sentences carefully, and choose the word that best fits the context. If you have a cough that just won’t go __(1)__ , it could be pertussis, more commonly known as whooping cough. According to a recent medical report, one quarter of adults who see their doctor for __(2)__ cough actually have this bacterial __(3)__ . Once a killer childhood disease, whooping cough has been in decline for years due to widespread vaccination of children. But the immunity can wear __(4)__ in time, and the number of reported adult cases has been on the __(5)__ recently. In an otherwise healthy adult, symptoms include coughing, low-grade fever, and runny nose. The bacterial infection can be treated with antibiotics, which renders it less contagious and therefore less of a threat to __(6)__ infants. 1.a. back b. away c.down d.off 2.a.resistant b.defiant c.consistent d.persistent 3.a.infestation b.inflammation c.infection d.infraction 4.a.out b.off c.away d.down 5.a.wane b.verge c.rise d.move 6.a.unvaccinated b.irresistible c.resisting d.inoculated Hints 1. go –decrease 4. wear – become weak, thin, useless go – return wear – become thin/hard to see go – leave wear – become weak, tired, strained go –explode wear – become ineffective, disappear 2. – rebellious 5. on the –about to experience/happen – unchanging, steady on the – in motion – continuing, chronic on the – increasing – (things) unaffected on the – decreasing 3. – redness, soreness 6. – charming, attractive – disease, illness – not immunized – breaking of a rule/law – opposing, fighting back –invasion of insects or animals –immunized (protected against illness) 83 3 Health and medicine Vocabulary (2) In sickness and in health … until death do us part Α Sicknesses and symptoms – Hippocrates would have recognized some of the ailments in the box from his knowledge of Greek. Which ones are you familiar with? Share your knowledge with your classmates. arteriosclerosis epilepsy hemophilia sinusitis sleeping sickness stroke Now skim each text and fill in the missing disease. Then read each one a second time and match the boldfaced words with their meanings. (Note: Unless noted, the boldfaced words are nouns.) 1. (or “brain attack”) is America’s third leading cause of death (after heart disease and cancer) and the leading cause of adult disability. More than 500,000 Americans are afflicted and nearly 150,000 die each year. Despite this grim toll, however, it ranks low in the public’s awareness. Many lives might be saved if more people recognized the following warning signs: difficulty speaking or understanding even simple sentences; sudden weakness, numbness, or paralysis of the face, arm, or leg; sudden dimness or loss of vision, particularly in one eye; a sudden, severe headache; and temporary dizziness or loss of balance or coordination, especially if occurring along with one of the other warning signs. a. – light-headed, spinning feeling d. – loss of physical feeling b. – ability to control arms/legs e. – number killed or injured c. – lack of brightness f. – (pp) made to suffer 2. is a chronic brain disorder characterized by repeated seizures (or convulsions). The seizures can occur as a result of underlying brain damage or a structural brain lesion or as part of a systemic medical illness; in some cases they appear to have no organic cause. Seizures differ with the type of condition and may consist of loss of consciousness, jerking of parts of the body, emotional explosions, and/or periods of mental confusion. In individuals suffering from the disease, the brain waves, which are manifestations of electrical activity in the cerebral cortex, have an abnormal rhythm produced by excessive nerve-cell discharges. a. – wound, injury d. – sudden attacks (of this disease) b. – sudden, quick moving e. – clear indications c. – emissions, things sent out f. – state of being aware 3. , officially called African trypanosomiasis, has again become one of Africa’s biggest public health scourges. It begins with the tsetse, a fly with a nasty taste for blood. If your fly is carrying the trypanosome parasite, its bite can transmit the disease. If left untreated, it can put you on course for a slow, agonizing, and certain death. An unpleasant, flulike feeling sets in as you fight a foe that multiplies and tricks your immune system by changing its outer coat. Sooner or later, parasites inflame your brain, causing weird changes in your behavior, personality, and sleep patterns. You sink into a zombielike apathy and eventually lapse into a coma that ends in death. The World Health Organization estimates that each year 250,000 to 300,000 are left to suffer and die because their illness has gone undiagnosed and untreated. a. – enemy e. – (adj) causing great suffering b. – state of deep unconsciousness f. – (v) pass along to sb/sth c. – things that causes great suffering g. – (v) pass/fall (into a worse state) d. – state of total indifference h. – (v) cause swelling, pain, redness 84 Health and medicine 3 4. (or inflammation and congestion of the cavities of the cranium around the eyes) may follow a cold or occur independently but be misdiagnosed as a lingering cold. As with ear infections, several strains of bacteria that cause this condition have developed resistance to older antibiotics, resulting in chronic and recurrent infections. Fever, chills, thick nasal discharge, and pain around the eyes are the hallmarks. a. – skull, head bone e. – empty spaces in something solid b. – painful redness and swelling f. – kinds, types, breeds c. – distinctive characteristics g. – (adj) slow to leave; drawn-out d. – state of being blocked/full h. – (adj) repeated, reappearing 5. is a hereditary blood disease characterized by the inability of the blood to clot. This leads to massive bleeding, even from minor injuries. The disease is caused by an insufficiency or absence of certain blood proteins that aid in blood clotting. The bleeding may occur as excessive bruising or persistent bleeding after a simple cut. Hemorrhaging into joints and muscles can be disabling. Before the advent of modern therapy, the chance of surviving to adulthood was poor. a. – bleeding in large amounts b. – blackish-blue marks on skin c. – arrival of sth important d. – (v) thicken, form lumps e. – (adj) inherited f. – (adj) continuing non-stop 6. The major form of heart disease in the West is atherosclerosis, in which fatty deposits called plaque (made up of cholesterol and fats) build up on the inner walls of the coronary arteries. Atherosclerosis is actually a form of , or “hardening of the arteries.” In atherosclerosis, narrowing of the arteries gradually restricts the blood flow to the heart. Symptoms may include shortness of breath and a tight pain in the chest called angina pectoris. The plaque may become thick enough to totally obstruct the artery, causing a sudden decrease in the heart’s oxygen supply. Obstruction can occur when a piece of plaque breaks away and lodges further along in the artery. This is the major cause of heart attack, which is often fatal. Survivors must undergo extensive rehabilitation, and there is always the risk of a recurrence. a. – repetition, happening again e. – (v) limits, confines b. – layers of built-up matter f. – (v) becomes stuck c. – recovery process g. – (v) block, impede d. – blockage h. – (v) experience, be put through Symptoms synonymous – Each group contains three words that have something in common and a fourth that is unrelated. Underline the “odd one out,” and be ready to explain what the other three have in common. 1. lingering temporary chronic persistent 2. resistance protection immunity susceptibility 3. seizure wound injury lesion 4. scourge rehabilitation suffering affliction 5. symptom manifestation diagnosis hallmark 6. restriction recurrence obstruction blockage 85 3 Health and medicine B Routine check-up (preposition and particle practice) – The paragraphs below contain useful health phrases. Use the words in each box to fill in the blanks. Some may be used more than once. 1. down in over to under up If you’re healthy, you can say you’re good health or good shape/condition. If you’re feeling ill, you can say you’re feeling the weather, run , or not quite par. In extreme cases, you may feel like death warmed (or warmed , in British English). 2. above down from in of out If you think you’re coming wrong over to up with something, you’d better have a check- you. Chances are you’re only suffering but most doctors will want to look you you are under a common cold or a touch the flu, carefully. They’ll ask you if your temperature is pain. They may also ask if you are short Then they’ll subject you to see what’s breath or if you are normal or if stress at work. a physical exam. Before prescribing anything, they’ll ask if you are allergic any medications. 3. at for from in of on to under If doctors suspect something serious, they may refer you a specialist, who may want to operate you. In this case you’ll need to be scheduled surgery and admitted a hospital. Before the operation, you will be put anesthesia. If all goes well, you will be discharged the hospital a matter days and back your feet no time all. 4. against from in to up Children are vaccinated early life to build their resistance (or immunity) diseases. Elderly people who have weak immune systems and are susceptible to get an annual flu shot to protect themselves 5. at for of respiratory infections may want ) infection. to A great number of ailments are attributed cancer (or certain smoking. Smokers run the risk the lungs. Passive smokers are also risk developing heart disease and these diseases. C Anatomical idioms – Complete the sentences with words from the box. When you finish, go back and underline the idioms and discuss what each means. Do any have equivalents in your own language? chest ears elbow 1. She finds it hard to finger heads lungs thumbs . 4. You’ll feel better if you get your problems off your . 5. Upon seeing the mouse, she screamed at the top of her 6. Tell me the good news. I’m all . ! 7. Michael is always dropping things. He’s all . 8. The spoiled girl has her parents wrapped around her little 86 shoulder are better than one. 3. If you need to, you can always cry on my 10. Good journalists know how to stomach movies that have a lot of violence. 2. Perhaps I can help. Two 9. The eager photographer had to nose . his way through the crowd. out a good story. All but two of the body parts in the box are shown in the picture. Which are not? Health and medicine Grammar (2) 3 Clauses (Part II) Α Adverbial clauses and related structures – Adverbial clauses and related structures (e.g., prepositional phrases and infinitives of purpose) can be used to express a wide range of functions, such as time or place, reason or purpose, and so on (see chart below). When tackling a grammar or cloze item that involves one of these structures, it’s important that you focus on the incomplete clause or phrase and try to work out what its role is. For example: • Does it express an action that happens before or after an action in the main clause? • Does it present information that contrasts with the main idea? • Does it explain why something happens in the main clause? Recognizing the function and, in turn, knowing what linking words can be used to introduce this function will help you choose the option that best fits the meaning of the gapped sentence. Here is a summary of the main functions and their links. (For examples of sentences in which these links are used, see Grammar Reference, page 171.) Function Question prompt and common links Time When? – before, after, as, as long as, as soon as, by, by the time, the minute, the moment, once, since, till, until, when, whenever, while Place Where? – where, wherever Reason Why? – as, since, because, for, now that, because/due to/owing to the fact that Related structures: because of/due to/owing to + noun/-ing Purpose For what purpose? – in case + present/past; so that + can/will or could/would; for fear (that)/lest + might/should Related structures: to/in order (not) to/so as (not) to + base form; in case of + noun; with a view to/ with the aim of + -ing; for + -ing, for fear of sth /-ing sth, to prevent sb from + -ing, to avoid + -ing Result So/Such … that what happens? – that (after so/such), so Concession and Contrast Although what contrasting condition exists? – although, even though, though, in spite of/despite the fact that, while, whereas, however/no matter how … , whatever/no matter what … , adj/adv + though/as + subject + verb Related structures: in spite of/despite + noun/-ing, regardless of Manner How? In what way? – as, as if, as though, in that Practice – Underline the adverbial clause in each item, decide its function, and underline the best answer. Function 1. The baby was born 2. they got to the clinic. whenever – until – before – while However – Wherever – When – Though she is overweight. because – despite – in case – that his excessive smoking. in case of – due to – for fear of – despite in case of – despite – as – to avoid though – although – if – as though Whenever – However – Though – As so as to – with a view to – to – for in that – despite – due to – for fear that Once – Before – Since – Now that doctors go, people ask them for advice. 3. Ann eats so much 4. He coughs a lot 5. She gave me her number 6. She looks 7. she is going to faint. ill he was, he insisted on going to work. 8. She studied hard becoming a doctor. 9. He put off seeing the doctor 10. an emergency. he was ill! he begins treatment, he’ll feel much better. 87 3 Health and medicine B Participle clauses – Participle clauses are formed with present (or -ing) participles and past participles. They are reduced forms of relative and adverbial clauses. Study the examples, and discuss the differences you see between each full and reduced form. 1. PARTICIPLE CLAUSES that are reduced forms of RELATIVE CLAUSES • • Relative clause (active voice) Reduced form (with -ing participle) Ed is on the train that is arriving now. → Ed is on the train arriving now. Anyone who attended the class was bored. →Anyone attending the class was bored. Eve, who lives in a village now, is very happy. → Living in a village now, Eve is very happy. Relative clause (passive voice) Reduced form (with past participle) Al’s wearing a tie which was bought by Sue. → Al’s wearing a tie bought by Sue. Ed, who was born on July 4th, is a real patriot. → Born on July 4th, Ed is a real patriot. 2. PARTICIPLE CLAUSES that are reduced forms of ADVERBIAL CLAUSES • lauses with while and active clauses C with because, as, since Reduced form (with -ing participle) They discussed work while they had lunch. While having lunch, they discussed work. Because/Since I felt ill, I stayed home. → Feeling ill, I stayed home. As/Since I’m not rich, I can’t buy a Porsche. → Not being rich, I can’t buy a Porsche. Note 1 To reduce a clause whose subject is different from the subject of the main clause, we must place the subject before the participle. Since it was dark, they walked quickly. Note 2 • → It being dark, they walked quickly. → To emphasize that the action in a reduced clause occurs before the action in the main clause, we use the perfect form of the participle: i.e., having + past participle: He felt better as he had seen her. → Passive clauses with because, as, since Having seen her, he felt better. Reduced form (with past participle) Because/Since he was fed up, he quit his job. → Fed up, he quit his job. As he was exhausted, he went straight to sleep. → Exhausted, he went straight to sleep. Practice: Anatomy of a not-so-broken heart – Complete the story with the present (-ing) or past participle form of the verbs in parentheses. Pay special attention to the time markers in bold (see Note 2 above). (1) (determine) to work things out, the quarreling couple had agreed to meet. Now, (2) (sit) in his home, they chatted quietly. When the mood seemed right, he pulled her close … and that’s when everything changed! Without warning, she pulled away, (3) (slap) him hard. (4) (discover) the day before that he had another girlfriend, she knew that her love for him had died. (5) (stun), he watched her slam the door and walk out of his life forever. On the street below, it now (6) 3 a.m., our heroine failed to find a taxi, so she set out on foot. (7) contemplated her stupidity. After all, (8) have known better. (9) disgust: “Women (10) 88 (be) (trudge) through the darkness, she (end) her last relationship in the same way, she should (arrive) home after a two-hour trek, she grabbed her diary and wrote in (decide) to break off a relationship should do so early in the evening.” Health and medicine 3 C FROM THEORY INTO PRACTICE – Now let’s look beyond the basics and see how adverbial clauses and participle clauses might be tested on the exam. For items 1-12, circle the correct choice (a-d). Adverbial clauses – Question types range from items that ask you to fill in the correct link to more complex items that test both structural topics (e.g., word order, tense, related structures) as well as lexical issues. Answers often contain lowerfrequency linking words (e.g., once instead of as soon as, or since instead of because), while wrong choices are often structurally possible but illogical in context. 1. he cancelled tomorrow’s meeting, let’s meet to discuss sales. a.Since c. Once b.After d.When 2. We can leave a.until b. since you finish packing. c.afterwards d.once 3. I planted a hedge, people could see into my yard. a.Whenever c.Until b.Since d.Because 4. the doctor’s optimism, the patient did not recover. a. Although c.Regardless b.Despite d. On the contrary 5. Eve ran she could to help the old man. a. so fast that c. faster so b. as fast as d. faster than 6. The nurses are on strike because of happy with pay cuts. a. they weren’t c. they hadn’t been b. not to be d. their not being Participle clauses – Items testing participle clauses seem to be on the rise in recent years. Always start by analyzing what is in the question stem. Then try to predict the full form of what is missing. If choices start with both past and present participles, use what you know about participle reductions to help you narrow down the choices. 7. from working six hours straight, she finally took a break. a. She was tired c. Tired b. Had she been tired d.Tiring 8. The people a.waited b.waiting for the bus looked tired and upset. c. are waiting d. have been waiting 9. The conclusion a. is presented b. is presenting in the article is that the drug is harmful. c.presenting d. presented 10. happy in his new job, John missed his old colleagues. a. Although c.Despite b.Usually d.Even 11. “Did the aide give Mr. Smith his medicine?” “No, told it was necessary, she didn’t.” a. not having been c. had she not been told b. she hadn’t been d. her not being 12. She works long hours, a. making b. makes it difficult to see her friends. c.makes d. making it 89 3 Health and medicine Vocabulary (3) Daunting developments Α The conquest of disease – Read the following text, taking note of the boldfaced words. When you finish, check the accuracy of statements 1-7. If a statement is true, write T. If it is false, correct it. Thanks to stunning advances in preventive medicine and technology, the 20th century saw a major increase in life expectancy (how long an average person lives) and a great decline in infant mortality (i.e., a statistic that compares the number of babies who die to the number of babies born). Scientists managed to eradicate (totally destroy or put an end to) diseases like smallpox and the bubonic plague, which could once decimate (or destroy a large part of) major segments of the population. A major factor has been improved sanitation – i.e., providing safe water supplies, regulated food sources, and adequate rubbish-disposal and sewage systems (or underground networks that remove human and industrial waste). A major role has also been played by advances in immunology (the study of how the body protects itself against disease) and the introduction of mass immunization, whereby large groups (e.g., school-age children) are vaccinated (or inoculated) with substances that protect them against various infectious diseases. Finally, vast improvements in hospitals, health clinics, and health-insurance plans guarantee that basic health care is now available to many more people than ever before. In the 21st century, scientists will continue to combat old foes like cancer (a disease marked by abnormal cell growth) and new diseases like AIDS. They will also have to cope with a resurgence (i.e., a reappearance or renewed wave) of old diseases as microorganisms evolve and develop resistance (immunity) to 20th-century antibiotics. 1. Diseases like smallpox have been immunized in the 20th century. 2. Sanitation is the study of how the body protects itself from disease. 3. Immunity to disease is the same thing as resurgence. 4. Life expectancy has fallen off dramatically in the past century. 5. AIDS is a disease that is characterized by unusual cell growth. 6. Sewage systems contribute to a safer, more sanitary environment. 7. We decimate or eradicate children to build up their resistance to disease. Diagnostic technology – You should be able to unlock the meaning of most of the words in the box by searching out their Β Greek and Latin roots. Underline the roots that you recognize. After discussing the possible meanings with your classmates, use the words to complete the text. Nouns angiogram biopsy electrocardiogram electroencephalogram Adjectives benign malignant sophisticated ultrasound tumor Technology now allows us to diagnose a wide array of diseases with great precision. If a patient has a(n) (i.e., an abnormal growth), a(n) (2) (1) can be performed in which tissue is removed and analyzed under a microscope to determine if it is (harmless) or (4) (cancerous). (3) (a test that records the Heart disease may be detected by a(n) (5) electrical impulses of the heart). If doctors suspect blocked blood vessels, they may send you for a(n) (an X-ray taken after injecting dye into blood vessels around the (6) technology, which uses sound heart). Another exciting advance is (7) waves to project images on a video screen. Neurological diagnosis has greatly been aided by the , which traces electrical activity in the brain. Even more (8) (complex, advanced) are techniques such as Computerized Axial (9) Tomography (CAT scans) and Nuclear Magnetic Resonance Imaging (NMRI). 90 Health and medicine 3 C Surgical advances – You can get a feel for some of the boxed words (a) by looking for clues in the roots and (b) by looking for words that remind you of words in your own language. Share your observations with your classmate, and then use the words to complete the text. bloodless microsurgical bypasses prosthetic devices cataracts severed incision transplant Astounding advances have also been made in surgical procedures. Surgeons can now reattach (1) (completely cut off) limbs with the aid of (2) techniques that allow them to repair nerves and blood vessels with high-powered microscopes. In addition, people who have lost arms or legs can be surgically fitted with battery-powered artificial limbs called (3) . Heart surgeons can not only repair leaky heart valves, but they can also construct (4) (or “detours”) around narrowed segments of arteries or veins. Great strides have also been made in (5) medicine, where an organ (e.g., a heart, liver, or kidney) is taken from one person and placed into another. Finally, thanks to advances in laser technology, high-tech (6) surgical techniques are now being used to repair bone and joint damage, remove (7) from the eyes, and treat hard-to-reach brain tumors without surgeons having to make even the tiniest (8) (surgical cut). D Reproductive medicine – When it comes to having babies, women now have a wide range of options that were not available fifty years ago. Explore the roots and possible meaning of the words in the box, and then use the words to complete the text. amniocentesis artificial insemination conceiving The development of (1) congenital fertility oral contraceptives (or birth-control pills) in 1960 now seems “old hat” compared to other developments that have occurred in reproductive medicine. Thanks to (2) (analysis of the fluid in the amniotic sac) and other forms of prenatal testing, doctors are now able to diagnose a wide array of illnesses in unborn children that are either inherited or (3) from faulty fetal development). Women who have trouble (4) may be helped by drugs that increase their (5) life). They may also try (6) (resulting (becoming pregnant) (ability to produce , where ova are fertilized by sperm outside the body under laboratory conditions. With gene therapy, cloning, and other feats of genetic engineering now coming into their own, who knows what advances will be made over the next few decades? 91 3 Health and medicine Time out for review Anatomy – Symptoms – Developments Α Disease control center – The goal of this exercise is to remind you that medical terminology in many languages draws heavily on Greek. Use your knowledge of your own language to help you match the diseases in the box with their descriptions. Exam tip “It’s all Greek to me!” When you come across technical vocabulary, remember to slow down and look for clues within the words that will help you unlock their meanings. anemia cirrhosis arteriosclerosis diabetes asthma hemophilia arthritis leukemia bronchitis pneumonia 1. – a condition in which there are too few red blood cells in the blood 2. – type of cancer marked by the overproduction of white blood cells 3. – hardening of the arteries, often caused by old age and/or a high cholesterol count 4. – the bleeder’s disease: people who have this bleed extensively, even from a small cut, because their blood clots more slowly than normal 5. –respiratory disease often brought on by allergies (e.g., to dust, pollen, and animal fur); symptoms include a tightness in the chest, shortness of breath, and wheezing 6. –infection and inflammation of the inner lining of the airways in the lungs, characterized by a bad cough 7. – infection and inflammation of one or both lungs 8. – liver disease in which healthy cells are replaced with thick scar tissue 9. 10. –disorder of the metabolism, characterized by underproduction of insulin, which results in undesirably high levels of sugar in the blood – condition causing pain, stiffness, and swelling of the knee, wrist, and/or other joints of the body B Word forms – Fill in the blanks with nouns derived from the boldfaced words in the definitions on the right. 1. the state of being mortal _________ 2. the substance that people are vaccinated with _______ 3. a place through which sewage is channeled _____ 4. the act of eradicating (or putting an end to) something ___________ 5. the act of conceiving something (e.g., a baby or an idea) __________ 6. the act of avoiding or protecting against conceiving _____________ 7. another word for a prosthetic device __________ 8. another word for a malignant tumor __________ 9. what you have if you are immune to something ________ 10. what you have if you are resistant to something __________ 11. the study of genes and inherited characteristics ________ 12.the passing on of hereditary (i.e., inherited) traits from 92 ________ one generation to the next Health and medicine Reading 3 Visualizing metaphors In Unit 2 we saw how writers help their readers follow them by defining technical terms the first time they are used. Another technique they use is to describe an object or process with figurative language – that is, with metaphors or comparisons that create a lasting image in the reader’s mind. Think back, for example, to the first time you learned about the human body in science class. Your teacher probably introduced you to some parts of the body by comparing them to machines or building materials. Α Warm-up – See if you can match the words in the box to the devices, systems, or other objects to which they are commonly compared. brain cell DNA heart nervous system urinary system a. – computer CPU d. – building block b. – electrical wiring e. – plumbing/drainage system c. –pump f. – genetic blueprint Writers often use metaphors to help them explain complex subjects. When you encounter one, do your best to visualize the image the writer describes. The more clearly you can “see” it in your mind, the easier it will be to understand and remember. B READING PRACTICE (1): Drug abuse – The passage below contains two metaphors related to drug abuse. Skim the text, find the metaphors, and discuss why he prefers one to the other. Then answer the questions below. No magic bullet can eradicate drug abuse overnight, but treatment does bring sustained reduction in drug use. The metaphor of a “war on drugs” is misleading, however. It implies a lightning, overwhelming attack. We defeat an enemy. But who is the enemy in this case? It’s our own children. It’s our fellow employees. The metaphor starts to break down. The United States does not wage war on its own citizens. The chronically addicted must be helped, not defeated. A more appropriate conceptual framework for the drug problem is the metaphor of cancer. Dealing with cancer is a long-term proposition. It requires the mobilization of support mechanisms – human, medical, educational, and societal, among others. To confront cancer, we must check its spread, deal with its consequences, and improve the prognosis. Resistance to the spread of both cancer and drug addiction is necessary, but so is patience, compassion, and the will to carry on. Pain must be managed while the root cause is attacked. The road to recovery is long and complex. 1. The writer implies that the metaphor “war on drugs” is inadequate because … a. we have not yet found an appropriate weapon to fight the problem. b. treatment has proved to be ineffective in reducing drug abuse. c. countries should not declare war on their own citizens. d. drug abuse cannot be dealt with quickly and forcefully. 2. The writer prefers the cancer metaphor because … a. it gives us hope that a cure may be found for the illness in the near future. b. it suggests that the problem must be tackled on many fronts over a long time. c. it makes us realize that drug addiction is a terminal illness. d. it motivates us to use extreme measures to prevent its spread. 93 3 Health and medicine C READING PRACTICE (2): Commando viruses to the rescue STEP 1: Skimming for gist – The first two paragraphs of the reading passage opposite are based on an elaborate, extended metaphor. Skim the text, and then answer the questions below. 1. Which phrase best sums up what the entire passage is about? a. agents of destruction b. genetic diseases c. viruses and gene therapy d. war on DNA 2. Which character most closely reflects the author’s image of a virus? a. Harry Potter b. Rambo c. Alexander the Great d. Hippocrates 3. What kind of language is used to describe viruses in the first two paragraphs? STEP 2: Vocabulary retrieval – Go through the text again and find words that correspond to the meanings below. (The words are in the order that they appear in the text). Paragraph 1 1. – cruel, without mercy 4. – take for military use 2. – (phr) create disorder/chaos 5. – (phr) create disorder/chaos 3. – enter secretly 6. – small, hard growth of skin 1. – (army) persuade to join 3. – move quietly, secretly 2. – (army) signed up, made to join 4. – use, employ, put into action 1. – complicated, detailed 3. – be caused by 2. – (phr) progress despite difficulty 4. – troublesome and dangerous Paragraph 2 Paragraph 3 STEP 3: Anatomy of a metaphor – In the left column, put a “V” next to the roles the author ascribes to viruses and an “S” next to those he ascribes to scientists. Then match phrases (a–g) with the roles. The first has been done as an example. 1. Roles V Rambo-like soldiers who kill in cold blood, without mercy 2. Soldiers trained to commit sabotage and create chaos 3. Soldiers who take civilian property for military use 4. Generals planning a battle 5. Spy-like troops who secretly invade enemy territory 6. Hands-on weapon experts 7. Military personnel trained to attract new soldiers Phrases c Phrases a. recruiting the virus to fight the good fight – viruses are being enlisted Think about it b. infiltrate cells – slip behind enemy lines Does the image of geneticallyaltered Rambo viruses being sent into battle help you understand what gene therapy is all about? Would the text be as effective without the metaphor? c.ruthless, machinelike – commandos in a microscopic battleground – special-forces lifestyle d. deploy new weapons against disease e. commandeer genetic machinery for their own use f.research has targeted these tiny agents of destruction – a new strategy is emerging g.inflicting mayhem – wreak havoc from within – tiny agents of destruction 94 Health and medicine 3 STEP 4: Now answer the questions below the passage. Remember to underline the key words in each question and mark the place in the text where you think each answer is found. Ruthless, machine-like, alive only when inflicting mayhem, viruses are commandos in a microscopic battleground. They infiltrate cells, commandeer genetic machinery for their own use, and wreak havoc from within. They bring ills as minor as warts, as major as AIDS. No wonder so much medical research has targeted these tiny agents of destruction. Now, in an ironic twist, medicine is recruiting the virus, and its special-forces lifestyle, to fight the good fight against our worst diseases. Cancer, AIDS, inherited ailments such as cystic fibrosis – full-frontal attacks with drug treatment have 5 done little to stop these killers. So a new strategy is emerging: viruses are being enlisted to slip behind enemy lines and deploy new weapons against disease. Because the weapons are genes, the strategy is known as gene therapy. Through an elaborate biochemical process, genes direct the construction of proteins that keep things running smoothly in a cell. When disease strikes and things stop running smoothly, it’s often because one or more genes have become faulty in some way. Researchers have made headway in identifying the faults responsible for many genetic diseases, such as 10 cystic fibrosis and hemophilia, as well as acquired diseases such as cancer. Much of this progress stems from the new recombinant-DNA technology, with which biologists can pick apart and rearrange genes. Now the same technology is allowing genetic engineers to assemble made-to-order viruses, which are essentially genes wrapped in a shell. Normally, viruses replicate* and cause damage by forcing their own genes into a cell’s DNA. By replacing these rogue viral genes, researchers can use the virus to introduce genes of their own choosing into diseased cells. Gene therapists thus correct 15 the mistakes produced by a faulty gene, treating illness at its root cause. * replicate – (biology) divide into smaller molecules which are exact copies of the original 1. Which statement best sums up the main idea of the passage? a. Viruses are lethal enemies that must be wiped out at all costs. b. Scientists are learning to use viruses in the fight against certain diseases. c. Gene therapy is the latest weapon in the war against killer viruses. d. Stronger drugs are our only hope against waging war on disease. 2. Why were viruses the target of so much medical research in the past? a. because of their size b. because of their ability to fight cancer, AIDS, and cystic fibrosis c. because of their resistance to drug. d. because of the wide range of medical problems they cause 3. How do scientists use viruses to fight certain diseases? a. by wrapping their genes in a special shell b. by replacing their defective genes c. by changing their genetic make-up and inserting them into diseased cells d. by ordering them to destroy faulty genes 4. Recombinant-DNA technology allows genetic engineers to a. replicate viruses. b. identify faulty viruses that cause disease. c. increase protein construction in faulty genes. d. take genes apart and reorganize them. 5. What is not true about gene therapy? a. It is more successful than drug therapy in fighting certain diseases. b. It involves changing the genetic make-up of a virus. c. Its goal is to correct defective genes within a virus. d. It utilizes viruses to combat disease. 95 3 Health and medicine Writing (2) The “for and against” essay Another common writing task that you might encounter on the ECPE asks you to discuss opposing opinions about a controversial issue or to analyze the advantages and disadvantages of a subject. A Analyze the task – Read the task carefully, and answer the questions that follow. Genetic engineering allows scientists to modify the characteristics of living things by altering their DNA. Recent advances in areas like gene therapy, cloning, and agriculture have raised tough questions about how genetic engineering should be used. On the one hand, the technology shows great promise; on the other, there are moral issues and real dangers to consider. Examine both sides of the issue, and finish by saying what you think might be done to resolve the conflict. 1. Underline what the task asks you to do. How many parts are there? 2. On the exam you have only 30 minutes to compose your answer. With this in mind, which part should you plan to develop in more depth in the main body? How many paragraphs do you think you would you need for this? 3.Which part would be suitable for discussing in the conclusion? to develop this part in more detail in the main body? If you had time, would it be wrong B Analyze the model – Now study the model on the opposite page, and do the tasks below. 1. Check (✓) the statement that is true about the introduction. The writer shows us both sides of the issue, and clearly suggests that she is in favor of one of the sides. The writer captures her reader’s interest by setting up a dramatic contrast between the opposing sides of the issue, and suggests that she will discuss both sides in a balanced way. 2.The writer supports her topic sentence in paragraph 2 with examples drawn from two main areas. Underline the phrases that she uses that clearly signal this to the reader. How many examples does she give under each area? 3.How many arguments does the writer present against genetic engineering? What are they? Put a circle around the three words that the writer uses to signal the start of each argument. She uses two similar series of subjects earlier in the essay. Can you find them? 4. In which paragraph does the writer first state her opinion? have waited till the conclusion? Do you think this is too early, or should she 5. Is the conclusion effective? Why or why not? 6.Imagine that other students in the class were opposed to genetic engineering. Would they have used the same paragraph plan, or do you think they would have altered it slightly? What other changes, if any, would you expect to find? C Try it! – Choose one of the topics below, and use the paragraph plan opposite to write your response (250-300 words). 1.Given the threat of “mad cow” disease, avian flu, and other problems related to eating meat (e.g., cloning or injecting farm animals with hormones), more and more people are becoming vegetarians. Discuss the advantages and disadvantages of being a vegetarian, and conclude by giving your opinion. 2.Whether or not to legalize “medically assisted suicide” − that is, the practice of doctors assisting terminally ill patients to end their lives − is a highly controversial subject. Discuss the arguments for and against, and conclude by giving your opinion on the matter. 96 Health and medicine For some people, genetic engineering conjures up a world free from hunger and disease. For others, it evokes visions of mad scientists commanding armies of evil clones. While few would deny that genetic engineering has already yielded enormous benefits, it is hard to ignore the concerns that many people have. In my opinion, genetic engineering has had and will continue to have great social benefits. In medicine, for example, it has already resulted in our ability to manufacture unlimited quantities of products like insulin and human growth hormone. Progress has also been made in identifying and correcting genetic faults that result in diseases like hemophilia and cystic fibrosis. More controversial, but potentially just as beneficial, are areas that are still in their infancy. One is cloning healthy cells to replace diseased or damaged cells. Another is cloning human cells into organs for transplant. Breakthroughs have also occurred in agriculture. Cloning is now used to produce healthier, more productive herds of farm animals, and genetic engineering has also been used to develop higher-yielding, more nutritious crop strains with greater resistance to pests, drought, and disease. But for all the potential benefits, genetic engineering has many detractors. Some believe that genetic engineering is immoral and unnatural because it is wrong to tamper with nature. Others argue that it might someday be used for destructive purposes like biological warfare or for cloning human bodies solely to harvest organs for wealthy transplant patients. Still others feel that genetically modified crops may have disastrous effects on the environment and on the humans that consume them. There are no easy answers, but if society is to make the most of genetic engineering, then measures must be taken to ensure that scientists carry out their work responsibly. I feel strongly that research should not be banned, as that would mean sacrificing the benefits. What I think we need is carefully thought-out legislation that regulates research so it proceeds under strict supervision with clear ethical guidelines. Task tip 3 INTRODUCTION: Tell them what you’re going to tell them wRestate the topic, suggesting both sides of the issue. MAIN BODY: Tell them Paragraph 2: Arguments “for” wClear topic sentence introducing benefits wFirst argument, supported by examples and/or reasons w2nd argument, supported by examples and/or reasons Paragraph 3: Arguments “against” wClear statement transitioning from benefits into disadvantages/ problems wArguments against, supported by examples and/ or reasons. CONCLUSION: Tell them what you’ve told them and suggest solution wAcknowledge the complexity of the topic by suggesting that both viewpoints are valid. wState your viewpoint and suggest what could be done to resolve the issue. • Follow the paragraph plan above. • Use clear topic sentences in the main body, supported by examples and/or reasons. • Use linking words, transitions, and other sign posts that help your reader track your main ideas. • Where possible, combine ideas into compound and complex sentences for richness and variety. •Remember to present both sides of the issue in the main body, and clearly state your opinion in the conclusion. 97 3 Exam practice Grammar 1. Whether or not the boss gets angry will depend on the idea to him. a. how do we present b. how to present c. however we present d. how we present 6. “I’m so cold, I’m shaking like a leaf!” “ is a hot bath and a nice cup of cocoa.” a. That you need b. Whatever you need c. What you need d. Supposing you need 2. “I’m thinking of joining a gym.” “ you do, you’ll be an old man!” a.If b. By the time c. In case d.Until 7. , I decided to go to the party and not miss out on the fun. a. As tired I was b. Despite I was c. Although tired d. So tired I was 3. It’s odd how different the twins are. hard, the other is extremely lazy. a.As b.While c.However d.Since one works 8. “Which Joan are you talking about?” “You know, the one . . . in the choir.” a. that she is b.who’s c. of whom is d. which is 4. I’m so relieved. my exams are over, I can finally relax again. a. Now that b. As soon as c. As a result of d. Due to 9. The doctor told me to call her discuss the results of my tests. a. so that b. in order to c. in case d.because 5. so 0. 1 hard I try, I can’t figure out how to open this bottle of medicine. a.Whereas b.How c. In spite of d. No matter how to Mary, I have no idea why she left the party early. a. Had I not spoken b. I didn’t speak c. Not having spoken d. I’m not speaking we could After you finish Here is a list of some of the grammar topics you’ve seen in Unit 3. a. linking words (time) f. noun clause as subject b. linking words (contrast) g. word order in noun clauses c. linking words (manner) h. relative clause: structure d. linking words (reason) i. participle clause (reduced adverbial) e. linking words (purpose) j. clause of concession (full vs. reduced) Look at items 1-10 again. Write the letter of the grammar point that each item tests. 1. 2. 3. 4. 5. 6. 7. 8. If you missed any of the items, go back to Grammar (1) and (2) and review the relevant topics. 98 9. 10. Exam practice 3 Cloze When a new microbe emerges from the jungle or a resurgent 11. a. has c. that b. had d. having 12. a.travelers c.one b.germ d.bacteria 13. a.from c.across b.as d.out 14. a.in c.which b.because d.that News of resurgent microbes comes __(13)__ an unexpected 15. a.infectious c.infecting surprise to ordinary Americans, who share the widespread belief d.infection __(14)__ medical science and modern sanitation have conquered 16. a.beliefs c.innovations __(15)__ disease. Smallpox was vanquished; tuberculosis nearly d.germs bacteria emerges from a Third World slum, humans provide a perfect system for its spread. A drug-resistant strain of plague __(11)__ emerged in Madagascar in 1997 could make it from the African island to the United States in a day and a half, hitching a ride on some unwitting traveler. Other __(12)__ might hop a ride on coconut milk from Thailand, melons from Mexico, or raspberries from Guatemala. so, and, as sanitation, the spread of vaccinations, antibiotics, and other __(16)__ swept the developing world, every trend pointed towards continued __(17)__ on almost every front. Health officials confidently talked about an “epidemiological transition” as improving public health shifted concerns __(18)__ chronic diseases, such as cancer. That was before AIDS made its __(19)__ , before new resistant strains of tuberculosis followed b.infected b.news 17. a.succession c.problems d.progress b. defeat 18. a.that c.by d.for b.toward 19. a.appearance c.way d.escape b.discovery suit, and before malaria made its great leap forward __(20)__ 20. a.to c.will become the world’s most widespread mosquito-borne disease. d.has b.and After you finish Here is a list of topics that are tested in items 11-20: a. train of thought: which noun? b. complex sentence structure: what’s missing? c. structure/meaning (singular vs. plural noun in context) d. vocabulary: easily confused word forms e. vocabulary: common collocations Look at items 11-20 again. Write the letter of the topic that each item tests. (Several are used more than once.) 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. Now compare answers with a partner. If any of your answers are different, to reach agreement. 99 3 Exam practice Vocabulary 21. Advances in medicine have brought about a dramatic increase in life . a. mortality b. fatality c. anticipation d. expectancy 26. It took more than a month for the surgical incision to completely. a. clot b. cure c. treat d. heal 22. The doctor assured the parents that their son’s for recovery was extremely good. a. diagnosis b. prognosis c. prescription d. symptom 27.He is currently treatment for a rare and debilitating tropical disease. a.combatting b.resisting c.expelling d.undergoing 23. A well-balanced diet promotes good health and disease. a. immunization against b. susceptibility to c. resistance to d. recurrence of 28. Everyone was relieved when the doctor reported that he had managed to the malignant tumor. a.fracture b.diagnose c.remove d.transmit 24. It will be many years before AIDS is finally a. deployed b. immunized c. eradicated d. infiltrated 25. His hearing has been seriously explosion last year. a. impaired b. afflicted c. obstructed d. decimated . since the 29. The doctor the patient’s heart condition to smoking and excessive drinking. a.attributed b.alleviated c.prescribed d.diagnosed 30.The of lasers and computer technology has revolutionized modern medicine. a.eradication b.breakthrough c.advent d.resurgence After you finish Look at items 21-30 again. Find the choices that are synonyms of the following: 21. − death caused by war, etc. 26. − thicken, form lumps 22. − sign of illness 27. − experiencing, having 23. − protection against 28. − break/cause to break 24. − used, sent into action29. − reduced, lessened 25. − blocked − complete destruction 100 30. Exam practice 3 Reading Many diseases once easily treatable with antibiotics − tuberculosis, for example − have turned into killers again. The reason for this is that bacteria have evolved. They not only resist penicillin and other treatments, but they actually thrive in, and in some cases even require, the presence of antibiotics. Many researchers are concerned that the development of new antibiotics may not keep up with the appearance of resistant bacterial strains. In the wake of such alarming developments, researchers have discovered a new class of chemical compounds that could serve 5 as powerful antibiotics and perhaps even anticancer agents. The new compounds come from Xenorhabdus, bacteria that live inside certain species of soil-dwelling microscopic worms called nematodes. These bacteria cannot survive in the soil and can reproduce only inside insects. They are thus content to reside harmlessly inside the nematode until the worm encounters their breeding ground. When that happens, the nematode burrows into the hapless insect and releases a packet of bacteria. The bacteria start feeding 10 on the insect and reproduce furiously. In turn, the nematode starts feeding on the multiplying bacteria, and then the nematode starts reproducing, so everybody benefits except the insect, which eventually dies and bursts open. What intrigued researchers was that the bacteria, during their feeding frenzy, produce chemicals that kill competing bacteria. They began studying the chemicals while investigating the antibiotic effect of dumping millions of nematodes into soil to control insect crop pests. Their efforts have isolated several unique compounds from 15 Xenorhabdus. One, which they call nematophin, is a powerful antifungal and antibacterial agent. Another, named xenorxide, attacks human lung, breast, prostate, and colon cancer cells, while leaving healthy cells alone, at least in a petri dish. One major advantage of these new chemicals is that even low doses are highly effective against bacteria now immune to the penicillin family of antibiotics. In lab tests the chemicals don’t appear to be toxic in mice or rats. As yet, little is known about why these compounds work so well. Experts say it will be at least six to 20 eight years before the drugs have any human application. 31. Why have scientists recently become so interested in Xenorhabdus bacteria? a. Because they have amazing reproductive properties. b. Because, unlike other forms of bacteria, they cannot survive in soil. c. Because they can control certain types of crop pests. d. Because they may be effective in fighting penicillin-resistant bacteria. 32. What is true about tuberculosis? a. Scientists are still looking for a way to cure the disease. b. Treatments that worked in the past are no longer effective. c. It thrives in the presence of penicillin and other antibiotics. d. It is spread by bacteria that live in microscopic worms. 33. According to the passage, what is true about Xenorhabdus bacteria? a. They reproduce wildly when they enter nematodes. b. They are resistant to penicillin and other treatments. c. They live in a symbiotic relationship with nematodes. d. They will only feed on dead insect matter. 34. Laboratory tests have indicated that, unlike nematophin, xenorxide ... a. may be useful in the fight against certain forms of cancer. b. have already proven to be safe for human application. c. may be useful in fighting diseases that now resist penicillin. d. can be successfully manufactured in a petri dish. 35. The writer implies that researchers ... a. must constantly search for new means of combating resistant bacteria. b. may never understand why nematophin and xenorxide are so effective. c. are ready to begin testing the new compounds in human beings. d. will never solve the problems posed by the evolution of bacteria. 101
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