--- I called you last night, but no one answered. --- Sorry, I _______ sleeping. A.must have been B....
2022-08-05 11:14:15 172次 天津市2019-2020学年高三上学期第一次月考英语试卷 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
--- I called you last night, but no one answered.
--- Sorry, I _______ sleeping.
A.must have been
B.would have been
C.must be
D.could be
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