单选题 Wilmut maintains that cloning animals has tremendous potential for helping people. Cloned Sheep, he says, could be used as living drug factories. Scientists could "engineer" sheep that produce drugs in their milk. And by altering the proteins on the surfaces of animal organs to make them more like human organs, scientists believe they may be able to create a plentiful source of organ donors for people.
Why not clone humans as organ donors? Theoretically, Wilmut says, there is no reason his techniques couldn't someday be used to clone people. Think about the possibilities: a whole basketball team of Michael Jordans, a scientific panel of Albert Einsteins, a movie starring and co-starring Brad Pitts.
On a more serious note, some experts argue that couples who have difficulty having a baby could make copies of themselves. And parents whose child has a fatal disease like cancer might be able to clone the child, creating a twin who could be a bone-marrow (骨髓) donor.
But even Ian Wilmut draws the line at cloning humans. "All of us would find that offensive," he says. Several countries, including Britain, Denmark, Germany and Australia, have made all scientific work on cloning humans illegal. The U.S. has no such law, but President Clinton has set up a panel of scientists and philosophers to study the issue. In the meantime, Clinton has imposed a ban on using federal money to clone humans.
Humans are more than the sum of their genes, argues a philosopher at one research institute. Though they look exactly the same, clones are not necessarily exact copies. The younger twin might grow up with different influences—say, unusual friends or special teachers. A cloned Albert Einstein might fail his physics class. A cloned pop star might sing terribly.
Say you were cloned. Would your twin live a shorter life because he or she started out with DNA that was already 10, 20 or 30 years old? Scientists aren't sure. And how could you prevent someone from taking a sample of your hair and making a clone of you? Again, no solutions.
What do you think? Should scientists be allowed to clone animals? How about humans?

单选题 Wilmut, a world-famous researcher on cloning, believes that ______ .
【正确答案】 D
【答案解析】第一段第一句话明确指出：Wilmut maintains that cloning animals has tremendous potential for helping people. Cloned sheep, he says, could be used as living drug factories.意为：Wilmut认为克隆动物有巨大的有助于人类的潜力。他说，“克隆羊，可用于生物制药厂”。故选D。
单选题 Which of the following is NOT mentioned by experts to benefit from human cloning?
【正确答案】 C
【答案解析】此题问“哪一个没有提到”。C选项：父母奄奄一息的一位双胞胎。其他选项均与原文不相符。
单选题 What is President Clinton's reaction to cloning humans?
【正确答案】 C
【答案解析】第四段最后一句说：In the meantime, Clinton has imposed a ban on using federal money to clone humans.意为：同时，克林顿强制实行了一条禁制令——禁止向克隆人项目拨款。由此可知克林顿对克隆的态度。故选C。
单选题 A philosopher at one research institute argues that ______ .
【正确答案】 B
【答案解析】第五段第一句指出：Humans are more than the sum of their genes, argues a philosopher at one research institute.意为：一个研究所的一位哲学家认为，人，不仅仅是基因的总和。由此可知哲学家的论点，故选B，其他选项均为干扰项。
单选题 What is the author's attitude towards cloning?
【正确答案】 C
【答案解析】此题问的是作者的态度，而不是Wilmut的态度，也不是那位哲学家的态度。作者对克隆的问题，既提出了克隆的好处，也提出了克隆的弊端。所以，他的态度是中立的。故选C。