unit2 cloning单元练习

人教新课标选修八 Unit 2 Cloning 单元练习
I. 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.、
II. 完成短语 :

1. cast ______ : 使沮丧 ; 是下降 ; 毁灭 ; 2. object ______ : 反对 ; 3. in favor ______ : 赞成 ; 同意 ; 4. be bound ______ : 一定 ; 5. pass on ______ : 将 ……传给…… ; 从一个活动阶段进入另一个活动阶段 ; 6. pay ______ : 成功 ; 奏效 ; 得到回报 ; 偿还债务 ; 7. agree ______ something : 同意 (计划 , 条件, 建议 , 安排等) ; 8. look ______ on : 回顾 ; 9. bring ______ to life : 复活 ; 10. take ______ to do something : 轮流做某事 ; 11. be cautious ______ somebody / something : 对……谨慎 ; 对…… 小心 ; 12. ______ a matter of fact : 事实上 ;
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
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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.
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7. 9. _____________________ V. 阅读理解

8. 10. ____________________

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
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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 B Research advances over the past decade have told us that, with a little work, we humans can clone just about anything we want, from frogs to monkeys and probably even ourselves! So, we can clone things, but why would we want to? Of all the reasons, cloning for medical purposes most probably benefit large numbers of people. How might cloning be used in medicine? 1. Cloning animal models of disease Much of what researchers learn about human disease comes from studying animal models such as mice. Often, animal models are genetically engineered to carry disease-causing mutations (变异) in their genes. Creating these transgenic(转基因的) animals is a process that requires trial-and-erro and several generations of breeding (培 育). Cloning technologies might reduce the time needed to make a transgenic animal model, and the result would be a population of genetically identical animals for study. 2. Cloning stem cells (干细胞) for the treatment of diseases Stem cells are the body’s bulding blocks, responsible for developing and repairing the body throughout life. As a result, they might be used to repair damaged or diseased organs and tissues. Researchers are currently looking up cloning as a way to create certain human stem cells for the treatment of diseases. 3. Cloning farm animals for drug production Farm animals such cows, sheep and goats are currently being genetically engineered to produce drugs or proteins that are useful in medicine. Just like creating animal models of disease, cloning might be a faster way to produce large numbers of genetically engineered animals. 5. From Purpose One, we can infer that ______. A. most transgenic animals are cloned B. most animals carry engineered genes C. most transgenic animal models are not cloned D. most animals carry disease-causing mutations in their genes 6. It can be learned from Propose Two that cloning technologies can be mainly used to _____. A. create damaged or diseased organs and tissues B. clone genetically defined human stem cells C. develop and maintain the body D. repair the body throughout life 7. According to Purpose Three, cloning technologies can be mainly used to ______. A. speed up the producing of genetically engineered animals B. produce drugs or proteins that are useful in medicine C. raise genetically engineered cows, sheep and goats D. produce large herds of animals for human beings

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参考答案 单词拼写 1. differ 6. commercial 2. straightforward 3. retired 7. objection 8. merely 4. forbidden 9. arguments 5. reasonable 10. obtain

1. ( down ) 2( to ) 3( of ) 4( to ) 5. ( to ) 6. ( off ) 7. ( to ) 8. ( back ) 9. ( back ) 10. ( turns ) 11. ( about ) 完形填空 1-5 BADDA 6-10 CBABC 11-15 BCDCA 16-20 BADCD 语法填空 1. death 6. up 阅读理解 1-4 CBDA 2. importance 7. tested 5-7 CBA 3. deadly 8. to 4. put 9. telling 5. available 10. did 12. ( as )

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