题目内容

 Dr. Smith, together with his wife and daughters, _____ visit Beijing this summer.

A.is going to                             B.are going to

C.was going to                           D.were going to

 

【答案】

A

【解析】

试题分析:考察主谓一致。本题的主语是由together连接的两个名词,谓语动词与前面的一个名词保持一致。句意:史密斯先生和他的妻子女儿今年夏天要去北京。而且今年夏天又是一个一般将来时的时间状语,故A正确。

考点:考察主谓一致

点评:在英语中,句子的主语和谓语动词要保持数上的一致关系,叫主谓一致。这种关系通常要遵循下面三条原则:1.语法一致原则。句子的主语是单数形式,谓语动词要用单数形式;主语是复数形式,谓语动词用复数形式2.意义一致原则即谓语动词该用单数还是复数取决于主语所表达的内容在含义是单数意义还是复数意义。3.邻近原则谓语动词该用单数还是复数形式,取决于最邻近它的名词、代词或其它词的数。

 

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Still waiting for little green men to make contact? Don't hold your breath.

A leading astronomer has concluded there probably aren't any aliens out there – meaning we are absolutely alone in the universe.

Even though there may be tens of thousands of other distant planets similar in size to Earth, the conditions on them are likely to be too hard to support life-forms such as ET.

Dr Howard Smith, a senior astrophysicist at Harvard University, believes there is very little hope of discovering aliens and, even if we did, it would be almost impossible to make contact.

So far astronomers have discovered a total of 500 planets in distant solar systems – known as extrasolar systems – although they believe billions of others exist.

But Dr Smith points out that many of these planets are either too close to the sun or too far away, meaning their surface temperatures are so bad that they could not support life. Others have unusual orbits which cause vast temperature variations, making it impossible for water to exist – the most important thing for life.

Dr Smith said, "We have found that most other planets and solar systems are wildly different from our own. It means it is highly unlikely there are any planets with intelligent life close enough for us to make contact." But his suggestions contradict other leading scientists who have claimed aliens almost certainly exist.

Only last month Professor Stephen Hawking said the fact that there are billions of galaxies out there made it reasonable to think there were other life-forms in the universe.

Researchers from the University of London have recently suggested that aliens could be living on as many as 40,000 other planets. But Dr Smith said: "Any hope of contact has to be limited to a relatively tiny space around the Earth, reaching maybe 1,250 light years out from our planet, where aliens might be able to pick up our signals or send us their own. But communicating would still take decades or centuries."

1.By saying "don’t hold your breath", the author advised the reader not to _____.

A.keep silent        B.give up           C.expect so         D.be afraid

2.Dr Smith concludes there probably aren’t any aliens because other planets _____.

A.are too far away from the earth

B.are different from the Earth in size

C.don’t have rich natural resources

D.don’t have a suitable living environment

3.Researchers from the University of London are mentioned to show that ______.

A.they have better explanations about aliens

B.aliens certainly exist on many planets

C.they disagree with Dr Smith’s suggestion

D.aliens can pick up signals from the earth

4.What’s the main idea of the text?

A.There must be other life forms in the universe.

B.We can communicate with aliens in decades.

C.The chances of finding aliens are slight.

D.Many other planets are quite different from the Earth.

 

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