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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 913

______ he was at home, I would have phoned him then.

A.Had I known B.I had known C.Would I know D.I would know
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hewasathome,Iwouldhavephonedhi