单项选择题

His success was due to ______ he had been working hard.

A．that
B．the fact which
C．the fact that
D．the fact of
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单项选择题
I hope ______ happy while you are here.
A．you to be
B．for your being
C．you will be
D．your being
单项选择题
It was in the bookstore ______ I met your brother the other day.
A．where
B．that
C．in which
D．in that
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