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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 662

All flights   because of the storm, they had to wait in the hall.

A.have put off B.were put off
C.have been put off D.having been put off
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Allflightsbecauseofthestorm,th