–What do you think the noise was? --It _
题型:选择题
问题:
–What do you think the noise was?
--It ___________ a cat.
A.may be
B.might be
C.can have been
D.might have been
–What do you think the noise was?
--It ___________ a cat.
A.may be
B.might be
C.can have been
D.might have been