单项选择题

It is the first time that you have been to our country, ______

A． haven't you
B． don't you
C． isn't it
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单项选择题
Let's go to visit Professor Wang, ______ we
A． would
B． shall.
C． wouldn't
单项选择题
He was so hungry that he had ______ all the dishes.
A． eaten up
B． eaten out
C． eaten off
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