But for their common interests, they_____ cooperated so smoothly in the investi
题型：不详难度：来源：
But for their common interests, they_____ cooperated so smoothly in the investigation of the case.| A．could have | B．will not have | C．could not have | D．have not |
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答案
| C |
解析
试题分析：考查隐含的虚拟语气：句意：要不是他们的共同兴趣，他们就不会在这个投资项目上合作的这么顺利。But for是“要不是”，是隐含的虚拟条件句，But for their common interests="if" it hadn’t been for their common interests，所以主句也是虚拟语气，和过去的情况相反用would/could/should have done.选C
点评：有时，句子没有直接给出假设情况的条件，而须通过上下文或其他方式来判断。这题用了but for代替if的虚拟语气，主句是1、表示与现在事实相反的情况，主语+should/would/could/might+do： 2、表示与过去事实相反的情况，主句：主语+should/would/could/might+have done 3、表示对将来情况的主观推测，主句：主语+should/would/could/might+do |
举一反三
—I saw your uncle take a taxi to the airport．Why didn’t you drive him there?
—I ,but my car ．| A．would; was fixed | B．would have; was fixed | | C．would have; was being fixed | D．did; was being fixed |
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Anirban Maitra, a professor at Oxford University, Jack’s success would not have been possible.| A．If it weren’t for | B．Were it not for | | C．Had it not been for | D．If it hasn’t been for |
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Henry would rather that his girlfriend _________ in the same department as he does.| A．worked | B．works | C．had worked | D．would work |
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John went to the hospital alone. If he me about it, I would have gone with him.| A．should tell | B．tells | C．told | D．had told |
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Jack is a great talker. It’s high time that he ____something instead of just talking.| A．will do | B．has done | C．do | D．did |
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