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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:566

I know it’s normal for such a thing to happen,but we________it if we’d been more careful.

A.need have avoided  B.could have avoided
C.will have avoided  D.had avoided
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Iknowit’snormalforsuchathingto