Loading... Please wait...Unit 2 Cloning
I. 单项填空
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
1. They have no idea at all ________.
A. where he has gone B. where did he go
C. which place has he gone D. where has he gone
2. Your composition is _________to your brother’s.
A. the same B. identical C. different D. equal
3. _______news came ________an unknown disease was spreading in the area .
A. Disturbing / that B. Disturbed / which
C. Disturbing / which D. Disturbed / what
4. He was _________down for several days after he heard the bad news .
A. broken B. cast C. cut D. discouraged
5. ______ what we have now, we can’t afford so large a house.
A. In B. At C. With D. Near
6. Opening the book, she found in it a white, plain envelope with her name ______ on it.
A. to print B. printed C. printing D. print
7. Seeing your picture, I couldn’t resist _____ the days _____ we spent together.
A. to think of; when B. to think of; which
C. thinking of; which D. thinking of; when
8. Are you suggesting that I _____ too old for the job?
A. am B. should be C. be D. was
9. His hard work paid ____ when he got the result.
A. off B. over C. out D. back
10. He is a cutler(刀具商)--¬¬¬_____, a man who sells knives and sharp tools.
A. in conclusion B. in general C. what’s more D. that is to say
11. One of the men held the view ____ the book said was right.
A. what that B. what C. that D. that what
12. We thought of asking him for help, but we were ______ to get in touch with him at that time.
A. happy B. anxious C. easy D. unable
13. He’s _______ to fail the exam if he doesn’t do any revision.
A. near B. fit C. bound D. easy
14. Every possible means _______to prevent the air pollution, but the sky is still not clear.
A. are being used B. have been used
C. has been used D. had been used
15. ---- Catherine, I have cleaned the room for you.
----- Thanks, you __________it . I could manage it myself.
A. needn’t do B. needn’t have done
C. mustn’t do D. shouldn’t have done
II. 单词拼写。
1. The brothers d_____ widely in their tastes.
2. The question is quite s_________ , while that one is much more complicated.
3. She r_______ from the competition after pulling a leg muscle.
4. Smoking is f_____ in public places.
5. His suggestion sounds quite r_________ to most of us.
6. The film was a _____ (商业的) success.
7. I’d like to come, too, if you have no _____(反对).
8. He ______ (仅仅)asked us our names.
9. There were strong ______ (争论) for and against the plan.
10. He always managed to ______(得到)what he wanted.
III. 完形填空
In the past, scientists have produced exact genetic copies of sheep and a few other animals. They ____ 1 ____ these clones from a single cell of an adult animal.
Recently, a private group of scientists has announced ____ 2 ____ to make an exact copy of a human being. Doctor Zavos, an American member of the team, says he and ____ 3 ____ will soon begin to clone humans and they hope to produce the world’s forst cloned ____ 4 ____ within the next two years.
Doctor Zavos says the new ____ 5 ____ group plans to offer human cloning to women unable to become ____ 6 ____ and produce children. The ____ 7 ____ would be similar to that used to clone animals. It would ____ 8 ____ clearing genetic material from a woman’s egg. Doctors then would ____ 9 ____ genetic material from the woman’s husband into the egg ____ 10 ____ putting it in the women’s uterus(子宫).
Doctor Zavos says his ____ 11 ____ plans to do its work in a country near the Mediterranean Sea, but he did not ____ 12 ____ the country. He days an Italian reproductive expert, Severino Antinori, is ____ 13 ____ the team. Doctor Antinori has made ____ 14 ____ efforts to help many older women become pregnant. He is known for ____ 15 ____ pregnancies in women as old as sixty.
Many medical experts and other groups ____ 16 ____ the idea of cloning humans. Several doctors criticized the ____ 17 ____ by Doctor Zavos. They say doctors do not know if cloning humans is ____ 18 ____ or safe. They say it would be irresponsible to ____ 19 ____ to clone a human being. That is because the ____ 20 ____ of success are too small and the risks are too great.
1. A. bought B. created C. discovered D. found
2. A. plans B. results C. successes D. agreements
3. A. another B. othes C. the other D. the others
4. A. plant B. animal C. bird D. baby
5. A. international B. national C. American D. Italian
6. A. successful B. born C. pregnant D. fertile
7. A. imagination B. technology C. story D. symbol
8. A. involve B. start C. make D. borrow
9. A. translate B. place C. take D. make
10. A. after B. while C. before D. on
11. A. country B. group C. university D. company
12. A. call B. found C. name D. consider
13. A. managing B. running C. controlling D. leading
14. A. high B. total C. great D. wide
15. A. successful B. beautiful C. thankful D. sorrowful
16. A. take up B. object to C. put up D. bring down
17. A. announcement B. program C. subject D. idea
18. A. careful B. interesting C. unable D. possible
19. A. manage B. refuse C. attempt D. hope
20. A. facts B. results C. sizes D. chances
IV. 语法填空
仔细阅读下面的短文，短文中有10个空格，请按照短文意思填写相应的词，每空一词。
Some years ago, SARS broke out in the mainland of China, causing some people to be killed or nearly got close to ____ 1 ____ . The situation was so severe that there was no time to debate who is to blame. The most ____ 2 ____ (importance) thing for the government to do is to find out the cause of this ____ 3 ____ (dead) disease. They invited all the most famous experts in this field to discuss and quite a few suggestions were ____ 4 ____ (put) forward. Some of the top experts picked out those suggestions and tested them to see whether they were ____ 5 ____ (avail). Doctor Zhong chose one patient who was seriously ill and had little hope of picking ____ 6 ____ and had the new medicine ____ 7 ____ (test) on him. To his great joy, this patient recovered! He made his way ____ 8 ____ his office and telephoned to the top official, ____ 9 ____ (tell) him this exciting news. For convenience, he moved to live in his office. His method ____ 10 ____ make sense. Not soon after that, the other hospitals also controlled this terrible disease and kicked it out finally.
1. __________ 2. __________
3. __________ 4. __________
5. __________ 6. __________
7. __________ 8. __________
9. __________ 10. __________
V. 阅读理解
A
Have you seen Jurassic Park? In this film, scientists use DNA kept for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter and more dangerous than expected. That’s nothing more than a fiction.
But could we really clone endangered animals?
To date, the most successful attempt to do so was the cloning of a gaur, a rare ox-like animal from southeast Asia. Scientists used a cow to bring the cloned baby gaur, named Noah. Two days after birth, however, Noah died from a common bacterial infection. Other endangered species that may be cloned include the African bongo antelope (邦戈羚羊), the Sumatran tiger, the cheetah (猎豹), and the giant panda.
Next, could we really clone extinct animals?
In theory? Yes. To do this, you need a well-kept source of DNA from the extinct animals such as wool mammoth (毛象), Tasmanian tiger, or even dinosaur, and a closely related species, still living, which could serve as a surrogate mother.
In reality? Probably not. On the one hand, it’s not likely that extinct animals’ DNA could survive undamaged for such a long time. Cloning extinct animals as wool mammoth, Tasmanian tiger, or dinosaur is much more difficult due to the lack of properly well-preserved DNA. On the other hand, for example, a gaur can have a cow as a surrogate mother, definitely not a monkey. But what about an extinct animals as unique as the panda? What species could possibly serve as a surrogate mother?
Cloning presents many exciting possibilities. However, even if extinct animals are brought back, they could not survive in today’s world. Not only do most extinct animals have no habitat to love in, but the other plants and animals they depended on for food may also be gone as well.
1. It can be learned from the text that ________.
A. scientists have cloned the African bongo antelope
B. both the cheetah and the giant panda live in Asia
C. the gaur lives in Asia and is endangered
D. the gaur is an extinct species
2. The underlined words “a surrogate mother” probably refer to a female who ______.
A. contributes its eggs to another female B. gives birth to a baby for another female
C. gives birth to a baby of its own D. cannot give birth to a baby
3. The difficulty in cloning an extinct species is the lack of ______.
A. both the well-preserved DNA and plants to live on
B. both the habitat to live in and the well-preserved DNA
C. both habitat to live in and plants to live on
D. both the well-preserved DNA and a surrogate mother
4. In the author’s opinion, it is possible that ______.
A. some extinct species may be cloned, but not survive
B. extinct species may be cloned and easily survive
C. a gaur can have a monkey as a surrogate mother
D. all the extinct species may be cloned