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Withoutjointeffortsofallthemembers，weourtaskinsuchashorttime．（）A.shouldn'taccomplishB.shouldn'thaveaccomplishedC.couldn'taccomplishD.couldn'thaveaccomplished

题目详情

Without joint efforts of all the members，we ______ our task in such a short time．（　　）

A. shouldn't accomplish

B. shouldn't have accomplished

C. couldn't accomplish

D. couldn't have accomplished

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答案和解析

答案：D．根据题干中的without可知，此句是含蓄虚拟条件句，相当于if条件从句if it hadn't been joint efforts of all the members，这里表示与过去的虚拟，主语用：主语+would/should/could/might+have done．而“shouldn't have done”表示过去本不应该做某事而做了，意思不对，故选D．

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