I didn't hear the phone.I _____ asleep.
I didn't hear the phone.I _____ asleep.
A.must be
B.must have been
C.should have been
D.could have been
A.must be
B.must have been
C.should have been
D.could have been
英语人气：910 ℃时间：2019-12-07 04:12:51
优质解答
B
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