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(天文學(xué)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(哈勃望遠鏡) 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(高倍望遠鏡) 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(信號). 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.”
小題1:Seth Shostak and Alexandra Barnett are _____.
A．a(chǎn)stronomersB．farmersC．singersD．drivers
小題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
小題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,
小題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.
小題5:What does the underlined phrase “l(fā)ife forms” in the last paragraph mean?
A．MessagesB．ToolsC．Intelligent beingsD．Radio signals

小題1:A
小題2:C
小題3:B
小題4:B
小題5:C

試題分析：本文敘述了科學(xué)家認為其他星球也存在智能生命，因為宇宙形成的時間這么長，足夠其他星球形成生命；其次宇宙這么大，周圍會有跟地球相似的星球。不久來自太空的生命有可能將會和我們聯(lián)系，我們可能到2025年，也會和他們?nèi)〉寐?lián)系，我們可能會互相幫助。
小題1:細節(jié)理解題。根據(jù)Seth Shostak and Alexandra Barnett are astronomers(天文學(xué)家)可知Seth Shostak 和Alexandra Barnett是天文學(xué)家。故選A。
小題2:標題歸納題。根據(jù)Why do Shostak and Barnett think intelligent life exists on other planets?可知本文主要解釋為什么認為在其他星球上可能有智能生命存在，故選C。
小題3:推理判斷題。根據(jù)In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes(高倍望遠鏡) allow scientists to discover smaller planets可知在過去沒有像現(xiàn)在一樣的高倍望遠鏡，因此很難再宇宙中尋找到智能生命的跡象。故選B。
小題4:推理判斷題。根據(jù)“Probably not,” says Shostak. It’s a long way away.可知Shostak.認為來自太空的生命可能沒有來過地球，因為路途遙遠。故選B。
小題5:詞義猜測題。根據(jù) However, intelligent beings may contact us in other way, 可知智能生命可能會用其他方式聯(lián)系我們，故推測此處的life forms指的是intelligent beings，故選C。
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