He______have passed the exam, but he was too careless.A、canB、mayC、mustD、could

游客2023-11-15 41

问题 He______have passed the exam, but he was too careless.

选项 A、can
B、may
C、must
D、could

答案 D

解析情态动词题。本题考查情态动词表推测的用法。can have done表示对过去行为的怀疑，用于疑问句，译成“可能做过……吗”；may have done表示对发生过的事情的推测，意思是“可能已经”或“也许已经”，用于肯定句中；must have done表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句；could have done意思是本来能够做某事而没有做。根据句意判断，D正确。

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