单项选择题

Never ______ to the U. S. A..

A．I have been
B．do I have
C．have I been
D．have I do
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单项选择题
______ he can recover soon, I don't mind how much money I have to pay.
A．So long as
B．So far as
C．In case
D．When
单项选择题
I'd like to ______ your article with you when you are not busy.
A．go for
B．go over
C．go by
D．go after
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