单项选择题


A．on
B．with
C．in
D．out of
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单项选择题
There was a ______ voice, but we didn't know what it was.
A．dim
B．weak
C．gentle
D．faint
单项选择题
A driver should concentrate ______ the road when he is driving, or it's easy to bring accidents.
A．to
B．on
C．for
D．in
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