单项选择题

I've never seen the young man （）next to the director.

A．sits
B．sitting
C．sat
D．to sit

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单项选择题
It's high time we （）something to stop road accidents.

A．did
B．are doing
C．will do
D．do
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If you （）your children well, you will be proud of them.

A．catch up
B．bring up
C．feed up
D．grow up
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