While Earth is the only planet known to support life, surely the adaptive ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future.

　　解题导语：为什么要花这么多人力、物力在探索太空上？作者在文中解答了这个问题。tion the questions in Paragraph 1?

　　A．To express his doubts.

　　B．To introduce points for discussion.

　　C．To compare different ideas.

　　D．To describe the conditions on Earth.

　　解析：推理判断题。文章是典型的议论说明文按提出问题—分析问题的结构行文。第一段通过提出一系列关于太空探索的问题引出中心。s are nature­born to do so.

　　B．Humans have the tendency to fight.

　　C．Humans may find new sources of food.

　　D．Humans don't like to stay in the same place.

　　解析：细节理解题。根据“Perhaps the best answer lies in our genetic makeup as human beings.”和“Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.”可知选A。________．chances

　　B．potential resources

　　C．unexpected benefits

　　D．physical possessions

　　解析：词义猜测题。根据后面的“including improvements in earthquake prediction的prediction, 等可知应选unexpected benefits。pace exploration.

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