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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 489

"They didn’t take measures in time, otherwise the explosions ____."some experts said.

A.wouldn’t happen B.didn’t happen
C.wouldn’t have happened D.mustn’t have happened
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Theydidn’ttakemeasuresintime,o