单项选择题

There was a second knock at the door. It was the second time I () that afternoon.

A.was interrupted
B.was interrupting
C.had interrupted
D.had been interrupted

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单项选择题
When would Uncle Smith be free().

A．On Saturday.
B．From Monday to Friday.
C．On Sunday.
单项选择题
Why wouldn’t Uncle Smith come on Saturday().

A．He only wanted to come on Sunday.
B．He would be very busy on Saturday.
C．His car was broken down.
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