C．Sir John is positive about the future of human cloning.

　　D．Human cloning is creating something that didn't exist before.

　　解析：　细节理解题。根据第二段中的"after the birth of Louise Brown，the first 'test­tube baby'"可排除A项；文章尾段说明赞成者占6成，故排除B项；根据第二段中格登爵士的话可知，他对克隆人充满了希望，故排除C项；根据第二段的尾句可知，D项表述不正确。

　　答案：　D

　　3．The underlined word "identical" probably means "__________"．

　　A．same B．special

　　C．new D．clear

　　解析：　词义猜测题。根据画线词后的 "twin"和文中的"doctors would therefore simply be'copying what nature has already produced'"可知，A项正确。

　　答案：　A

　　4．It can be inferred from the passage that

　　________________________________________________________________________.

　　A．most people cast doubt on John's experiments

　　B．human cloning is and will be only a dream

　　C．few children love to be cloned in the future

　　D．human cloning may be realized someday

　　解析：　推理判断题。根据文章第二段的第一句可知，虽然克隆人类的尝试将引起复杂的道德问题，但是生物学家声称如果克隆技术变得有医学价值，人们很快就会消除他们的担心，因此可推断D项正确。

　　答案：　D

　　B

　　People like Martin Luther King Jr，Nelson Mandela，Kofi Annan and Mother Teresa have become famous all around the world.And what do they have in common？They are all winners of the Nobel Peace Prize.But none of them would have received their prize and the recognition it brings if it had not been for one Swedish man，Alfred Nobel.

When Alfred joined the Nobel family company，it had been developing explosives for many years.Alfred's father Immanuel，had started the family fortune by working for the Russian army to produce landmines and sea mines (地雷和水雷)．But the family made even more money