◎ 题干
— 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
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— 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. cou…”主要考查了你对  【情态动词】【现在完成时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。