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The room is in a terrible mess; it ______ cleaned.A、mustn’t have beenB、shouldn’
The room is in a terrible mess; it ______ cleaned.A、mustn’t have beenB、shouldn’
游客
2024-07-02
48
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问题
The room is in a terrible mess; it ______ cleaned.
选项
A、mustn’t have been
B、shouldn’t have been
C、can’t have been
D、wouldn’t have been
答案
C
解析
对过去否定的推测用“can’t have+过去分词”。
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