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- What do you think the noise was? - It a cat. [ ]A. may be B. might be C. can h

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- What do you think the noise was? - It a cat. [ ]A. may be B. might be C. can h

— What do you think the noise was?  
— It ___________ a cat. [     ]A. may be      
B. might be      
C. can have been      
D. might have been

试题答案

D