单项选择题

Some people can be addicted ______ mahjong.

A．to play
B．with playing
C．by playing
D．to playing
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单项选择题
The news ______ the radio announced surprised everybody.
A．which
B．that
C．in which
D．where
单项选择题
The authorities of this station see unemployment as their ______ priority.
A．standing alone
B．on the grounds that
C．number one
D．at first sight
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