The bedroom is in a terrible mess; it______cleaned.

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问题 The bedroom is in a terrible mess; it______cleaned.

选项 A、can’t have been
B、shouldn’t have been
C、mustn’t have been
D、wouldn’t have been

答案A

解析 can或could表示对已经发生的情况进行否定的推测,其结构为:“can’t(couldn’t)+have+过去分词”。
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