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