问题
Why didn’t you answer my phone when I phoned you at about 11 p. m. yesterday? —I ___________and failed to hear the phone.
A:might have slept
B:must be sleeping
C:might be sleeping
D:must have been sleeping
B:must be sleeping
C:might be sleeping
D:must have been sleeping
正确答案是：
同类题型
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do you think of the book -Oh, excellent It is worth _____ secondtime
honest, I would rathermydog out, which made so many troubles
The beautiful dress _______Miss Jones went to the ball was borrowed from a friend of hers.