单项选择题

This area has been free from Foot-and-Mouth Disease ( ) two years.

A．for
B．in
C．after
D．before
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单项选择题
Is there any way of ensuring we’ll have enough time( )our talks
A．in
B．on
C．with
D．for
单项选择题
下列为禁止进境物的是( )
A．土壤
B．水果
C．玉米
D．大豆
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