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
Some people enjoy sitting on the second floor of a big bus because______.
A．it is no danger
B．there are fewer people there
C．they can have a better view of the city
单项选择题
When you are in England, you must remember that______.
A．you'd better go by bus.
B．the traffic goes on the left.
C．the streets are very busy.
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