高等继续教育 / 计算机专业英语
正确率：100%
题型描述: 单选题
I didnˊt hear the phone last night, I ( ) asleep.
A. should be
B. must be
C. should have been
D. must have been
I didnˊt hear the phone last night, I ( ) asleep.
A. should be
B. must be
C. should have been
D. must have been
参考答案：