单项选择题

I'm ______.

A．in Row 1
B．on Row 1
C．in 1 Row
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单项选择题
Bob won't stop trying ______ he gets what he wants.
A．as
B．that
C．until
单项选择题
You'd better ______ your computer before we use it again.
A．see
B．check
C．begin
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