The room is in a terrible dirty surroundings: it______cleaned.

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问题 The room is in a terrible dirty surroundings: it______cleaned.

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

答案A

解析 can’t have done表示“不可能做过……”;shouldn’t have done表示“本不应该做某事但实际上却做了”;不存在mustn’t have done这一结构;needn’t have done表示“本没必要做某事”。根据句意可知,这里表示对过去情况的否定推测,A项符合要求。
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