题目内容
从所给的四个选项中,选出最佳答案
I didn't hear the phone. I ______ asleep.
[ ]
A
.must be B.must have beenC
.should be D.should have been
答案:B
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题目内容
从所给的四个选项中,选出最佳答案
I didn't hear the phone. I ______ asleep.
[ ]
A
.must be B.must have beenC
.should be D.should have been