单项选择题

People on foot can go across the road when______.

A．the traffic lights are green.
B．the traffic light are red.
C．the road is clear.
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单项选择题
When you go by bus in England, you must be careful because ______.
A．you may go the wrong way.
B．three are too many buses there.
C．there are big buses with two floors.
单项选择题
You should go to bed early every night.
A．Right.
B．Wrong.
C．Doesn't say.
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