The room is in a terrible mess; it ________have been cleaned.A．can’tB．mustn’tC．s
题型：不详难度：来源：
The room is in a terrible mess; it ________have been cleaned.| A．can’t | B．mustn’t | C．shouldn’t | D．wouldn’t |
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答案
| A |
解析
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。 |
举一反三
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