Bob would have helped us yesterday, but he ____________.A．is busyB．had been busy
题型：不详难度：来源：
Bob would have helped us yesterday, but he ____________.| A．is busy | B．had been busy | C．has been busy | D．was busy |
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答案
| ：Ｄ |
解析
| ：考查虚拟语气中的时态。根据前一句Bob would have helped us yesterday中的yesterday说明这是对过去情况的虚拟。But后面的句子使用陈述语气，故使用过去时。句意：昨天Bob本可以帮助我们的，但是他太忙了。故D正确。 |
举一反三
－Why didn’t Susan come to see us yesterday as she promised?
－______. | A．She must be busy | B．She might have been free | | C．She must have been busy | D．She can’t be free |
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On Sunday when I was a child, my father and I _________ get up early and go fishing.| A．could | B．would | C．might | D．should |
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David did not regret saying what he did but felt that he it differently.| A．could express | B．would express | | C．could have expressed | D．must have expressed |
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I should very much like to have gone to the party, but ______. | A．I"m not invited | B．I won"t be among the invited | | C．they won"t invite me | D．they didn"t invite me |
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We would have called a taxi yesterday if Harold ______us a ride home.| A．didn"t offer | B．wouldn"t offer | C．hasn"t offered | D．hadn"t offered |
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