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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 988

The haze or smog was so serious that the winter running _________.Some students complained as they ran

A.could have cancelled B.should have cancelled
C.must have been cancelled D.ought to have been cancelled
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Thehazeorsmogwassoseriousthatt