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题目内容
（西安石油大学大学英语I（下））
—Why didn.t you answer my phone when I phoned you at about 11 p. m. yesterday?
—I ___________and failed to hear the phone.(本题2.5分)
A、 might have slept
B、 must be sleeping
C、 might be sleeping
D、 must have been sleeping
—I ___________and failed to hear the phone.(本题2.5分)
A、 might have slept
B、 must be sleeping
C、 might be sleeping
D、 must have been sleeping
参考答案
