The room is in a terrible mess, so it ____________ (肯定没有打扫过).can’t have been cle

游客2023-07-24 49

问题 The room is in a terrible mess, so it ____________ (肯定没有打扫过).

选项

答案 can’t have been cleaned

解析 ①can’t have done结构表示对过去的否定推测；②被动语态。

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