单项选择题

I was unaware of the critical points involved, so my choice was quite_______________.

A．arbitrary
B．rational
C．mechanical
D．unpredictable
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单项选择题
She worked hard at her task before she felt sure that the results would ____________ her long effort.
A．justify
B．testify
C．rectify
D．verify
单项选择题
Please ____________ yourself from smoking and spitting in public places, since the law forbids them.
A．restrain
B．hinder
C．restrict
D．prohibit
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