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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 913

----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It's very difficult after all.
A  must have   B could have   C should have  D might have

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Marylooksveryupset.Shefailedto