单项选择题

The cloth should be put on the cupboard to （） the dust.

A．keep out
B．prevent from
C．protect for
D．leave off

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单项选择题
Tom took（）his father.

A．off
B．after
C．in
D．out
单项选择题
It is reported that an airplane（）the lake not far from Wuhan.

A．crashed into
B．pulled in
C．pushed in
D．struck out
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