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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 436

All flights __________ because of the snowstorm, we decided to take the train.

A.were canceled B.had been canceled
C.having canceled D.having been canceled
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Allflightsbecauseofthesnowstor