"The probable lifespan of human civilization is much greater if we're a multi­planet species as opposed to a single­planet species，"Elon Musk said last year.

　　His company SpaceX is working to send humans to space. In September，the firm test fired one of its new Raptor"interplanetary transport engines"which the company will use to carry astronauts to Mars.

语篇解读　本文是一篇说明文。史蒂芬·霍金教授认为人类不向太空发展就会失去未来。

3．Which of the following might Professor Hawking NOT agree with?

A．The human race has no way out but to stop progress in technology.

B．It will take at least one century to colonize a planet.

C．Artificial intelligence will bring disasters to the human race.

D．Mankind is facing many dangers caused by technological progress.

答案　A

解析　推理判断题。根据第四段第二句"We are not going to stop making progress，or reverse it，so we must recognize the dangers and control them."可知选A。

2．The underlined sentence"Our days on Earth are numbered"in Paragraph 1 implies"_____"．

A．we are particular creatures living on Earth

B．we can't live on Earth for much longer

C．there are too many days for human existence

D．each day has its particular meaning

答案　B

解析　句意理解题。此句意为"我们在地球上的日子不多了"。故选B项"我们不能在地球上生活得更久了"。

3．The paragraphs following this passage would probably talk about__________.

A．how to extend human lifespan

B．more threats the human race faces

C．the risk of artificial intelligence

D．SpaceX's plan to colonize Mars

答案　D

解析　推理判断题。根据最后一段第一句"His company SpaceX is working to send humans to space."可知选D。