单项选择题

Everyone is busy working. You can't stay here ______ you keep quiet.

A．when
B．once
C．if
D．unless
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We will do anything we can ______ you catch up with the others.
A．help
B．to help
C．helping
D．helped
单项选择题
I can ______ you to the market in my car.
A．send
B．pick
C．ride
D．take
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