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【题目】Listen, Mary ________ have done it. She’s been with me at the shop all day.

A.wouldn’tB.shouldn’tC.needn’tD.couldn’t

【答案】D

【解析】在英语中,can’t/couldn’t have done表示的是对过去否定的推测。句意:听着,玛丽是不可能干这件事的。她整天都我在商店里。根据句意,选D。

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