Is there intelligent life on other planets? For years, scientists said “no. or “we don’t know. But today this is changing. Seth Shostak and Alexandra Barnett are astronomers. They believe intellige 题目和参考答案——青夏教育精英家教网—

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Is there intelligent (有智力的) life on other planets? For years, scientists said “no.” or “we don’t know.” But today this is changing. Seth Shostak and Alexandra Barnett are astronomers(天文学家). They believe intelligent life exists (存在) somewhere in the universe. They also think we sill soon contact these beings(人；生物).
Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. “This is long enough for other planets to have intelligent life,” say Shostak and Barnett. The second reason is size—the universe is huge. “Tools like the Hubble Telescope(哈勃望远镜) have shown that there are at least 100 billion galaxies,” says Shostak. “And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might be similar to Earth.”
In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes(高倍望远镜) allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems. These planets might have intelligent life.
Have beings from space already visited Earth? “Probably not,” says Shostak. “It’s a long way away. However, intelligent beings may contact us in other way, such as radio signals(信号). In fact, they may be trying to communicate with us now, but we don’t have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other.”
小题1:Seth Shostak and Alexandra Barnett are _____.

A．astronomers

B．farmers

C．singers

D．drivers

小题2:What is the best title for Paragraph 2?

A．The Age and Size of Earth

B．Our Galaxy: The Milky Way

C．Why Intelligent Life Might Exist

D．Earth: The Only Planet with Intelligent Life

小题3:Why was it hard to look for signs of intelligent life in the universe in the past?

A．There were not any smaller planets.

B．There were not any powerful telescopes.

C．The astronomers were not interested in them.

D．The Milky Way didn’t exist at that time,

小题4:Why haven’t beings from space visited us yet according to Shostak?

A．They’re afraid of us.

B．It’s a long way away.

C．They don’t want to see us.

D．They don’t know how to use radio signals.

小题5:What does the underlined phrase “life forms” in the last paragraph mean?

A．Messages

B．Tools

C．Intelligent beings

D．Radio signals

小题1:A
小题2:C
小题3:B
小题4:B
小题5:C

试题分析：本文叙述了科学家认为其他星球也存在智能生命，因为宇宙形成的时间这么长，足够其他星球形成生命；其次宇宙这么大，周围会有跟地球相似的星球。不久来自太空的生命有可能将会和我们联系，我们可能到2025年，也会和他们取得联系，我们可能会互相帮助。
小题1:细节理解题。根据Seth Shostak and Alexandra Barnett are astronomers(天文学家)可知Seth Shostak 和Alexandra Barnett是天文学家。故选A。
小题2:标题归纳题。根据Why do Shostak and Barnett think intelligent life exists on other planets?可知本文主要解释为什么认为在其他星球上可能有智能生命存在，故选C。
小题3:推理判断题。根据In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes(高倍望远镜) allow scientists to discover smaller planets可知在过去没有像现在一样的高倍望远镜，因此很难再宇宙中寻找到智能生命的迹象。故选B。
小题4:推理判断题。根据“Probably not,” says Shostak. It’s a long way away.可知Shostak.认为来自太空的生命可能没有来过地球，因为路途遥远。故选B。
小题5:词义猜测题。根据 However, intelligent beings may contact us in other way, 可知智能生命可能会用其他方式联系我们，故推测此处的life forms指的是intelligent beings，故选C。

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