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

游客2024-02-25  8

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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