单项选择题

I was listening to the radio ______. I heard a knock at the door.

A. while
B. when
C. as
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单项选择题
When does the woman probably want the man to pick her up
[A] 6: I5.
B. 6:30.
C. 7:00.
单项选择题
What will professor Zhou do
A. He will be away.
B. He is going to meet Li Li.
C. He is rude.
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