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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1290

It is when the plane ______ that you’d better find out at the booking office.

A.would take off B.had taken off
C.was taking off D.is taking off
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Itiswhentheplanethatyou’dbette