Scientists have many theories about how the universe_____.A．came into beingB．was
题型：不详难度：来源：
Scientists have many theories about how the universe_____.| A．came into being | B．was coming into being | | C．had come into being | D．would come into being |
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答案
| A |
解析
| 考察时态。根据句意可知宇宙的形成是过去发生的，使用过去时。句意：关于宇宙是如何形成的，科学家有很多的理论。 |
举一反三
--Why does the river smell terrible?
--Because large quantities of water__________.| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
|
—Why didn’t you come to the cinema with us last Saturday?
—Oh，sorry．But I the film．| A．see | B．saw | C．have seen | D．had seen |
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The first edition in 1955 and a best seller ever since.| A．was published; had been | | B．had been published; had been | | C．has been published; has been | | D．was published; has been |
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Hurry up! The train . You know it at 8: 30 am.| A．leaves; leaves | B．is leaving; leaves | | C．leaves; is leaving | D．is leaving; is leaving |
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Cole Bettles ______ by a number of universities when he received an e-mail from the University of California last month. | A．had been rejected | B．has been rejected | C．has rejected | D．was rejecting |
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