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’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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