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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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“Why couldn’t they meet us at five o’clock?” “Because they were delayed by ________.”

A.heavy traffic  B.heavy traffics
C.crowded traffic D.crowded traffics
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Whycouldn’ttheymeetusatfiveo’c