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1、unit2 Cloning.阅读理解AThere are many ways in which human cloning is expected to benefit humans.Dr Richard Seed, one of the leading supporters of human cloning technology, suggests that it may someday be possible to completely change the aging process because of what we learn from cloning.Scientists bel
2、ieve that they may be able to treat heart attack victims by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged. Heart disease is the number one killer in the US and several other industrialised countries.There has been a breakthrough with human st
3、em cells. Embryonic stem cells can be grown to produce organs to repair or replace damaged ones. Skin for burn victims, brain cells for the brain damaged, hearts, lungs, and kidneys could be produced. By combining this technology with human cloning technology, it may be possible to produce needed or
4、gans for suffering people that will be free of rejection by their immune systems. Conditions such as Alzheimers disease, Parkinsons disease, heart failure, and other problems can be cured if human cloning and its technology are not banned.Though current treatments for infertility (不生育) are getting a
5、 fair amount of publicity in the news, they, in terms of percentages, are not very successful. Some data shows that current infertility treatments are less than 10 percent successful. Couples go through physically and emotionally painful procedures for a small chance of having children. Many couples
6、 run out of time and money without successfully having children. Human cloning could make it possible for many more infertile couples to have children than ever before possible.语篇解读：本文作者从几个方面介绍了克隆人技术给人类带来了利益。1According to Dr Richard Seed, we can use cloning technology to _.Aproduce more animalsBmake
7、 people live happilyCmake people look youngerDcure people of many diseases解析：选C推理判断题。根据第二段中的“to completely change the aging process”可知，Richard Seed认为克隆技术可以彻底改变变老的进程。因此推知，克隆技术可以使人们看上去更年轻。2We can learn from the passage that _.Acloning has already been used to treat heart diseaseBwe can treat a mans he
8、art disease by cloning heartsCmost people in industrial countries suffer from heart diseaseDmore people die of heart disease than of other diseases in the US解析：选D细节理解题。根据第三段最后一句可知，心脏病是美国和其他工业化国家的头号杀手，因此在美国死于心脏病的人要比死于其他疾病的人多。3What is the main idea of the last paragraph?AWith cloning infertile couples
9、 could have children.BTreatment of infertility is not successful.CInfertile couples suffer a lot physically and mentally.DIt is difficult for couples to have more children now.解析：选A段落大意题。联系全文可知，本文的主题是人类克隆技术。最后一段点明了现在治疗不孕的成功率很低，许多夫妇饱受煎熬，最后说明了利用人类克隆技术可以使不孕的夫妇有自己的孩子，因此A项正确。4What is the authors attitude
10、 towards human cloning?ASupportive.BDoubtful.CCautious. DCurious.解析：选A推理判断题。根据文章第一句，特别是关键词benefit及第二至五段(都是讲人类克隆技术会给人类带来益处)可推知，作者对人类克隆技术持支持的态度。BLooking back on my childhood, I am convinced that naturalists are born and not made. Although we were brought up in the same way, my brothers and sisters soo
11、n abandoned their pressed flowers and insects. Unlike them, I had no ear for music and languages. I was not an early reader and I could not do mental arithmetic.Before World War we spent our summer holidays in Hungary. I have only the dim(模糊的)memory of the house we lived in, of my room and my toys.
12、Nor do I recall clearly the large family of grandparents, aunts, uncles and cousins who gathered next door. But I do have a crystal clear memory of dogs, the farm animals, the local birds and above all, the insects.I am a naturalist, not a scientist. I have a strong love of the natural world, and my
13、 enthusiasm has led me into various investigations. I love discussing my favorite topics and enjoy burning the midnight oil reading about other peoples observations and discoveries.Then something happens that brings these observations together in my conscious mind. Suddenly you fancy you see the ans
14、wer to the riddle. Because it all seems to fit together. This has resulted in my publishing 300 papers and books, which some might honor with the title of scientific research.But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do not make a scientist: one of the outs
15、tanding and essential qualities required is selfdiscipline, a quality I lack. A scientist can be made a naturalist. If you can combine the two, you get the best of both worlds.语篇解读：作者认为自然主义者是天生的，不是后天造就的。而一个科学家应自我约束、刻苦训练，具备坚定的信念和明确的目标。从作者童年的经历和后来的成长判断，作者认为自己是自然主义者不是科学家。5According to the author, a bor
16、n naturalist should first of all be _.Afull of ambition BselfdisciplinedCfull of enthusiasm Dknowledgeable解析：选C细节理解题，作者认为一个科学家应自我约束、刻苦训练，并具备坚定的信念和明确的目标，根据第三段第一、二句“I am a naturalist, not a scientist. I have a strong love of the natural world, and my enthusiasm has led me into various investigations.”可知，作者认为天生的自然主义者首先应该有热情。故选C。6The first par
