阅读理解 "I''ve never met a human worth cloning," says cloning expert Mark Westhusin from his lab at Texas A&M University. "It''s a stupid endeavor." That''s an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two cows and expect to clone a cat soon. They just might succeed in cloning Missy this spring -- or perhaps not for another 5 years. It seems the reproductive system of man''s best friend is one of the mysteries of modern science. Westhusin''s experience with cloning animals leaves him upset by all this talk of human cloning. In three years of work on the Missy project, using hundreds upon hundreds of dog''s eggs, the A&M team has produced only a dozen or so embryos (胚胎) carrying Missy''s DNA. None have survived the transfer to a surrogate (代孕的) mother. The wastage of eggs and the many spontaneously aborted fetuses (胎) may be acceptable when you''re dealing with cats or bulls, he argues, but not with humans] "Cloning is incredibly inefficient, and also dangerous," he says. Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly the sheep was cloned in 1997, Westhusin''s phone has been ringing with people calling in hopes of duplicating their cats and dogs, cattle and horses. "A lot of people want to clone pets, especially if the price is right," says Westhusin. Cost is no obstacle for Missy''s mysterious billionaire owner; he''s put up $ 3.7 million so far to fund A&M''s research. Contrary to some media reports, Missy is not dead. The owner wants a twin to carry on Missy''s fine qualities after she does die. The prototype is, by all accounts, athletic, good-natured and supersmart. Missy''s master does not expect an exact copy of her. He knows her clone may not have her temperament. In a statement of purpose, Missy''s owner and the A&M team say they are "both looking forward to studying the ways that her clones differ from Missy." Besides cloning a great dog, the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals. However, Westhusin is cautious about his work. He knows that even if he gets a dog pregnant, the offspring, should they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems. "Why would you ever Want to clone humans," Westhusin asks, "when we''re not even close to getting it worked out in animals yet?"

单选题 By "stupid endeavor" ( Line 2, Para. 1 ) , Westhusin means to say that ________.

单选题 What does the first paragraph tell us about Westhusin''s dog cloning project?

【正确答案】 B

【答案解析】推断题。题目问：关于Westhusin的克隆狗的项目，第1段告诉了我们________。段落中谈到对这条狗Missy的克隆进展时，说：“They just might succeed in cloning Missy this spring—or perhaps not for another 5 years. (他们也许今年春天就能成功地克隆Missy狗——或者可能再过5年也不会成功。)”可以断定B项“结果还不明朗”是正确答案。说该项目“胜利在望”A项，“必然失败”C项，“进展顺利”p)，都于原文无据。

单选题 By cloning Missy, Mark Westhusin hopes to ________.

【正确答案】 D

【答案解析】辨认事实题。题目询问Mark Westhusin希望通过克隆Missy________。根据第4段最后一句话“In a statement of purpose，Missy''s owner and the A & M team say they are ''both looking forward to studying the ways that her clones differ from Missy. ’(Missy的主人和 A&M 研究小组都公开声明了他们的意图，就是渴望能研究出克隆狗与Missy之间在哪些方面是不同的。)”可知答案为D项“发现Missy与其克隆体的不同之处”。根据第 4段第5句“He knows her clone may not have her temperament(他知道她的克隆体也许没有她的性情)”判定，B项寻求改善狗的性情”是不正确的。A项探讨克隆人类的可能性”,C项“研究狗物种的生殖系统”在文中都没有体现。

单选题 We learn from the passage that animal clones are likely to have ________.

【正确答案】 C

【答案解析】事实细节题。题目问：从文中得知动物的克隆体可能会有________。根据最后一段倒数第二句“the offspring， should they survive，will face the problems shown at birth by other cloned animals：abnormalities like immature lungs and heart and weight problems(其后代就算能活下来，也都会面临其他克隆动物出生时显露出来的同样的问题，如心肺不成熟之类的畸形、体重不正常等。)”其中提到的“abnormalities like immature lungs and heart”是属于器官缺陷，即答案C项。D项“畸形”比较笼统。而A项“坏脾气”，B项免疫力缺乏”在文中都没有涉及。

单选题 It can be seen that present cloning techniques ________.

【正确答案】 A

【答案解析】事实细节加观点态度题。题目询问从文章可以看到当今的克隆技术——。最后一句说：“Why would you ever want to clone humans”, Westhusin asks， “when we''re not even close to getting it worked out in animals yet?” (“当我们还没有完全解决克隆动物的问题时，你怎么会想到要克隆人类呢?”Westhusin说道。)”因而A项克隆技术要达到成熟，还有很长的路要走”正确，同时可以排除D项为克隆人类做好了充分准备”。根据倒数第二段“Besides cloning a great dog，the project may contribute insight into the old question of nature vs. nurture. It could also lead to the cloning of special rescue dogs and many endangered animals. ”两句话分别用了“may”和“could”这两个表示不确定性的情态助动词表达克隆技术可能的应用功能，而不是说 B项“已经广泛应用于拯救濒危动物”以及C项为‘先天的本性对后天的教养’的问题提供新思路”。