题目内容

The room is in a terrible mess; it ________have been cleaned.
A．can’tB．mustn’tC．shouldn’tD．wouldn’t
A
考察情态动词，can't 不可能 mustn't 禁止 shouldn't 不应当 wouldn't 不会
句意为，这个房间乱七八糟，不可能已经打扫过的。
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