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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1127

When he saw all his books _____ here and there on the floor, he knew that something terrible _____.

A.lying; must have happened B.lie; must happen
C.lay; might have happened D.had lain; could have happen
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Whenhesawallhisbookshereandthe