单项选择题

I'll let you know as soon as he ______.

A．came back
B．comes back
C．will come back
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单项选择题
Go along the street ______ you reach the end of the road.
A．if
B．when
C．until
单项选择题
Here are some birthday cards ______ our teachers, ______ our best wishes.
A．for; in
B．for; with
C．of; with
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