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  • 科目:英语
  • 题型:单选题
  • 难度:较难
  • 人气:1959

I’m sorry, Bill. I _________ the book to you last week, but I was so busy that I forgot to do so.

A.must have returned B.could return C.should have returned D.might return
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I’msorry,Bill.Ithebooktoyoulas