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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 738

一I think I saw Mr. Smith at yesterday's party.
一He__there. He is now on a business trip in Greece. And he left the day before
yesterday.

A.mustn't have been B.couldn't have been  
C.might not be   D.should not be
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一IthinkIsawMr.Smithatyesterday