单项选择题

You must have finished it yesterday, ______

A．didn't you
B．did you
C．haven't you
D．have you
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单项选择题
It's great to see each other again, ______
A．is it
B．isn't it
C．does it
D．wasn't it
单项选择题
What a pretty house, ______
A．is it
B．isn't it
C．will it
D．won't it
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