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