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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:490

"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