单项选择题

I’m afraid we don’t have that book in stock, ______ we can order it for you.

A．as
B．but
C．since
D．for
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单项选择题
It was not until 3:00 pm ______ the secretary found the missing report.
A．where
B．that
C．as
D．while
单项选择题
I decided to ______ as a waiter in a restaurant during my summer vacation.
A．serve
B．turn
C．take
D．make
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