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- You don't forget when we borrowed that reference book, do you? - I can't remem

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- You don't forget when we borrowed that reference book, do you? - I can't remem

— You don't forget when we borrowed that reference book,  do you?  
— I can't remember now but  ___ sometime last week?     [     ]A. might it be                  
B. could it be  
C. could it have been          
D. should it have been

试题答案

C