Could you have been more careful Why ,what wrongI?

Could you have been more careful Why ,what wrong__I__?
A.did do B.will do C.have done D.had done
请选择,并加以解释.

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答案应该是C
could have done 是虚拟语气,表示对过去事情的假设,意思是本来能够做某事而没有做应该用现在完成时,表示过去发生的事情对现在的影响.不选D的理由是,本句中并没有一个过去的过去的概念,没有一个过去的时间点.所以就不可以用过去完成时.Could在这里只是表示虚拟语气,并不是单纯的过去时态.

1年前

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