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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1813

As he approached the door, Mike looked into the room again to see if he ________ anything behind.

A.left B.had left
C.has left D.would leave
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Asheapproachedthedoor,Mikelook