when we started to clone humans. More than 200 embryos, the start of 200 human beings, would die for the sake of just one embryo that would have the same DNA as someone else.

　　Cloning someone, at this present time, would be extremely dangerous to the birth mother and the clone. In studies done on cows, 4 out of 12 birth mothers died. There is a very high failure rate, which is showed in the cloning of Dolly. Even if you had a few good embryos, failures have been noticeable in animal tests.

　　So, should we work ahead in the world of cloning? I say no. The risks are greater than the benefits. It's dangerous to the clone and to the birth mother. We would be killing human lives in the process. It would also be a violation (侵害) of the clone's right to its own genetic identity and personality.

　　5．The author thinks human cloning is wrong mainly for ________ reasons.

　　A．2　　　　　　　　 B．3

　　C．4 D．5

　　解析：选C　推理判断题。文章的第二、三、四、五段各介绍一条理由，所以共四条理由。

　　6．According to the article, what is the author's opinion about identity?

　　A．Cloning itself gives parents great power over identity.

　　B．People's identity is completely determined by their genes.

　　C．Governments have the rights to confirm people's identities.

　　D．Cloning may prevent people from possessing their identity.

　　解析：选D　推理判断题。根据第二段中的"Humans are promised the right to their own personalities."以及后面的内容判断。

　　7．From Paragraph 4 we can infer that ________.

　　A．human cloning is much more difficult than animal cloning

　　B．Dolly is the most successful one among 200 sheep embryos

　　C．cloning means running the risk of wasting too much effort

　　D．numbers of baby animals are likely to be created by cloning

　　解析：选C　推理判断题。根据第四段中的"The rest died or were thrown away."可知。

　　8．Why does the author mention some movies in the first paragraph?

　　A．To introduce the topic of the article.

　　B．To present his idea about the movies.

C．To state the conclusion first.