单项选择题

It was not until he arrived at the station ______ he realized he had forgotten his ticket.

A．when
B．that
C．for
D．in
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Do yon remember______ Professor Fan during your last visit
A．introducing
B．being introduced to
C．to have introduced to
D．to be introduced to
单项选择题
The number of college students in our school ______ every year.
A．rises
B．raises
C．amuses
D．lifts
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