全新版大学英语课后练习答案book1 Unit 3

Unit 3

Part I Pre-reading Task

Script for the recording:

This unit begins with an article on science. Before you read it, let me tell you something about its author, Stephen Hawking.

Hawking is perhaps the most well-known scientist since Einstein. Like Einstein his work tackles the big questions, questions such as How did the universe begin? Why is the universe the way it is? and How will it end? He is now working on what is sometimes known as the 'theory of everything.' Among other things, this promises to explain what caused the Big Bang that started the universe.

But it is not simply the power of Hawking's mind that has led to his fame. For what many people find most striking about him is the contrast between the strength of his mind and the weakness of his body. For for many years Hawking has suffered from an illness that has left him unable to move and to speak normally.

Born in England in 1942, Hawking had a normal childhood, and it was not until he was a student at university that his illness started to affect him. Hospital tests showed he was suffering from a disease that weakens control over the muscles. The disease gets worse with time and there is no known cure. But Hawking did not lose heart. As he says, "although there was a cloud hanging over my future, I found, to my surprise, that I was enjoying life more than before. I began to make progress with my research, and I got engaged to a girl called Jane W ilde. That engagement changed my life. It gave me something to live for."

Hawking started research at Cambridge and went on to hold the same post that another great scientist, Newton, once held. Over the years his condition has worsened, but even when he finally lost the ability to speak, he managed to get round the problem. He now uses a computer that enables him to select words which are then turned into speech. "The only trouble," the English scientist says, "is that it gives me an A merican accent!"

- 102 - Appendix I

Part II Text A

Text Organization

2. 1) The importance of the teaching of science in schools.

2) The role mass media can play, especially what television can do.

Appendix I - 103 -

II. Prefixation 1. regained 3. undersupplied 5. precondition 7. mispronounced

2. undecided 4. disabled

6. foresight 8. enrich

III. Antonyms 2. 1)majority

3) increased 5) local 7) wrong

2) accepted

4) weakness es 6) late 8) false

Structure

1) My income is now twice as much as I used to earn two years ago.

2) I am wearing only half as much as I usually do because of the warm weather.

3) If you had spent half as much time on your studies as your elder sister did, you could have made the honor roll.

4) I could eat/could have eaten as much again if the doctor had not told me to go on a diet.

1) As is shown by the growth rate of GDP in the last two decades, China's reform and open policy is a great success.

2) As is predicted by some newspapers, there will be a substantial cut in tax on imported cars in

Good bad modern ancient Rich poor forget remember Dry wet go come Agree differ young old

Attack defend simple difficult Colored colorless like v., n. dislike Long short likely unlikely Early late trust distrust

- 104 -A pp endi x 1

the coming year.

3)As is proved by the records, China's human rights situation has been steadily improving over

the years.

4)The failure of the joint venture was not, as was assumed by outsiders, because of lack of

capital, but because of poor management.

Comprehensive Exercises

I. Cloze

(A)

1. attitude

2. highly

3. informed

4. bring... about

5. rate

6. sufficient

7. put across 8. proportion

9. Hence 10. ensure

11. audience

(B)

1. which

2. how

3. Besides

4. that/which

5. discoveries

6. Another

7. through 8. other

9. an 10. affect

11. imagine/tell 12. may

13. supply 14. around

15. make 16. live

Appendix

105 Part III TextB

Comprehension Check

l.d 3. a 5. c 7. b 2. b 4. c 6. a

Translation

(参见Appendix III) Language Practice

1. outcome 3. yield

5. worn down 7. amount 9. proposed 11. Somehow 13. process 15. challenges

2. frustrating 4. Failure

6. conclusions 8. professional 10. evaluating 12. bulk

14. step by step

Part IV Theme-related Language Learning Tasks

Model paper

How Science Changes Our Lives

Science has certainly changed our lives, bringing benefits to some and hardships to others. Computers, for example, have provided some with the comfort of working from home while at the same time throwing others out of work as their jobs are automated. In the future changes are likely to be even much greater as science reaches out to shape life itself. New organis ms (有机体) are already being engineered. New genetically modified crops promise benefits from higher yields and less use of harmful chemicals.

But once again we cannot be sure that science will only change our lives for the better. The possibility remains that some modern Frankenstein may carelessly or deliberately let loose a new and

- 106-Appendix I

dangerous form of life. However, we should have sufficient faith in the good sense of the public to believe that we could prevent this from happening.(146 words)

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(完整版)全新版大学英语第二版综合教程4课后答案全

Unit 1 lexf Organization

II. More Synonyms in Context 1) During the First World War, battles occurred here and there over vast areas. Some of the most dramatic fighting took place in the gloomy trenches of France and Belgium. 2) Elizabeth made careful preparations for the interview and her efforts / homework paid off. 3)1 spent hours trying to talk him into accepting the settlement, but he turned a deaf ear to all my words. 4) Pneumonia had severely weakened her body, and I wondered how her fragile body could withstand the harsh weather.

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