Many rules govern drivers on American streets and highways. The most common ones are the speed limits(限制). The speed limits control how fast a car may go.
On streets in the city,  the speed limitis usually 25 or 35 miles per hour.On the highways between cities, the speedlimit is usually 55 miles per hour. When people drive faster than the speedlimit, a policeman can stop them. The policemen give them pieces of paper which people call traffic tickets. Traffic tickets tell the drivers how much money they must pay. When drivers receive too many tickets, they probably cannot drive for a while.
The rush hour is when people are going to work or going home from work. At rush hour there are many cars on the streets and traffic moves very slowly. Nearly all American cities have rush hours. Drivers do not get tickets very often for speeding during the rush hours because they cannot drive fast.
What does the underlined word “ones” in the first paragraph mean?

A．Rules	B．Drivers.
C．Governments.	D．Highways.

On the highways, the police will stop you if your speed is over         .

A．25 miles per hour	B．35 miles per hour
C．55 miles per hour	D．45 miles per hour

According to the passage, traffic tickets tell the drivers       .
A how much they have to pay            B. where they have to pay
C. when they have to pay               D.why they have to pay
Drivers will not be allowed to drive for some time         .

A．if they drive too fast

B．If they drive too slowly

C．if they break the rules too often

D．if the stop too often

The passage is mainly about             .

A．rush hours	B．American drivers
C．traffic rules	D．traffic policemen