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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1076

------I don’t know why he has made such a silly mistake in the exam.
------ He ____________ it before he handed in the paper.

A.may have checked B.might check
C.must have checked D.should have checked
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Idon’tknowwhyhehasmadesuchasil