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　　沈阳铁路实验中学2014—2015学年度下学期期中考试
　　高二英语
　　时间：100分钟满分：120分
　　第Ⅰ卷（选择题共85 分）
　　第二部分阅读理解（共两节，满分40分）
　　第一节（共15小题；每小题2分，满分30分）
　　阅读下列短文，从每题所给的四个选项(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。
　　A
　　In the movie Jurassic Park, scientists clone dinosaurs by using the DNA that was preserved for millions of years. However, there is trouble when the cloned dinosaurs turn out fiercer and smarter than expected. Can dinosaurs really be cloned? Theoretically, they can; all that would be required is DNA from an extinct dinosaur and a currently living closely related species which would act as a surrogate mother (代孕母亲). In fact, there is continuing research to clone the Woolly Mannoth by extracting (提取) the DNA from frozen animals.
　　Actually, cloning is a phenomenon that occurs naturally in a wide variety of species. Whenever you see a pair of identical twins, they are examples of nature’s clones. Although scientists have been cloning certain plants like the carrot quite successfully for decades, attempts at cloning animals have not been as successful. However, they began long before the birth of Dolly, the sheep—the first mammal to be successfully cloned.
　　Cloning humans does give rise to some misgivings, raising a number of moral problems involved. In fact, the social influences of producing humans artificially were brilliantly explored in the famous novel Brave New World by Aldous Huxley, and also in the movie The Island.
　　Human cloning is basically about creating a genetically (基因地)identical copy of a previously existing person. Why would some people choose to clone human beings? Well, generally, it could maples unable to have babies have their own children. Replacing a dead child is also another reason why some people have expressed interest in the technology.
　　1. We can infer from the second paragraph that ________.
　　A. More and more people are interested in cloning B. Cloning has saved many animals from dying out
　　C. Cloning has a very short history D. Cloning plants is much easier
　　2. In what way is human cloning useful?
　　A. It can bring a dead person back to life.     B. It makes it possible to replace a dead child.
　　C. It can help cure some human diseases.     D. It can help people have more healthy children.
　　3. What does the underlined word “misgivings”in the third paragraph mean?
　　A. Worries. B. Aims. C. Regulations. D. Principles.
　　4. What attitude do people have towards human cloning?
　　A. They thinman cloning is useless. B. They believe it can help humans in many ways.
　　C. They believe it can cause many moral problems. D. They doubt whether it can succeed or not.