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Wehavedonethingsweoughtnottohavedoneand

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问题详情:

Wehavedonethingsweoughtnottohavedoneand

We have done things we ought not to have done and_____ undone things we ought to have done.

A. left B. leave C. will leave D. leaving

【回答】

A

知识点:动词时态

题型:选择题

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