【題目】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】在英語中，can’t/couldn’t have done表示的是對過去否定的推測。句意：聽著，瑪麗是不可能干這件事的。她整天都和我在商店里。根據(jù)句意，故選D。

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