单项选择题


A．making
B．cooking
C．doing
D．serving
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单项选择题
--Never thought to see you here.—______
A．So did I.
B．Oh, haven't you
C．It's a small world.
D．I'm well Thank you. And you
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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