would be different but human life and cultures have adapted in the past and surely could in the future.

　　1．Why does the author mention the questions in Paragraph 1?

　　 A．To express his doubts.

　　 B．To compare different ideas.

　　 C．To introduce points for discussion.

　　 D．To describe the conditions on Earth.

　　解析：推理判断题。作者在第一段提出问题是在吸引读者的兴趣，引起人们对其进行讨论。故选择C项。

　　答案：C

　　2．What is the reason for exploring space based on Paragraph 2?

　　 A．Humans are nature－born 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。从第二段可知人类的基因构成使得人类具有不断探索的自然本性。故选择A项。

　　答案：A

　　3．The underlined word "spin－offs" in Paragraph 4 probably refers to ________.

　　A．survival chances　　B．potential resources

　　C．unexpected benefits D．physical possessions

　　解析：词义猜测题。根据下文"...improvements in earthquake prediction，in satellites for weather forecasting and in ...are by－products(副产品) of technological developments in the space industry！"可知，科学的进步与发展已经给我们带来了很多益处，所以spin－offs的意思是unexpected benefits。

　　答案：C

　　4．What makes it possible for humans to live on other planets?

　　 A．Our genetic makeup.

　　 B．Resources on the earth.

　　 C．The adaptive ability of humans.

　　 D．By－products in space exploration.

　　解析：细节理解题。从第六段第一句话"...surely the adaptive ability of humans would allow us to live on other planets."可知C项正确。

　　答案：C

　　5．Which of the statements can best sum up the passage?

　　 A．Space exploration has created many wonders.

　　 B．Space exploration provides the best value for money.

　　 C．Space exploration can benefit science and technology.

　　 D．Space exploration may help us avoid potential problems on Earth.

　　解析：主旨大意题。文章主要讲述了人类为什么要探索太空及人类可以从不断探索中受益，怎样避免潜在的危险，故选择D项。

　　答案：D

　　Ⅵ.七选五阅读

A great life doesn't happen by accident. It is the result of allocating(分配) your