_________ you cross the street, you must look left and right.

A. When　　　　B. After　　　　 C.Before　　 D. If

When you are in England, you must (必须) be very careful (当心) in the streets because the traffic goes on the left. Before you cross the street, you must look to the right first and then the left.
If the traffic lights are red, the traffic must stop(停止). Then the people on foot can cross the road. If the lights are green, the traffic can go and people on foot mustn’t (禁止) cross.
In the morning and in the evening, when people go to or come back from work, the streets are very busy. The traffic is the most dangerous then.
When you go by bus in England, you have to be careful, too. You must always remember the cars drive on the left.
In many English cities, there are big buses with two floors. You can sit on the second floor. From there, you can see the city very well. That’ll be very interesting.
【小题1】Before you cross a street in London, you must look to          .

When you are in England. You must be very careful in the streets because the traffic(车辆) goes on the left. Before you cross （穿过）the street, you must look to the right first and then the left.

If the traffic lights are red, the traffic must stop. Then the people on foot can cross the road.

If the lights are green, the traffic can go and people on foot mustn’t cross.

In the morning and in the evening when people go to or come back from work, the streets are very busy. The traffic is most dangerous then.

When you go by bus in England, you have to be careful,too. You must always remember the traffic moves on the left. So you must be careful. Have a look first or you’ll go the wrong way.

In many English cities, there are big buses with two floors. You can sit on the second floor. From there you can see the city very well. That’ll be very interesting.

(    )61. Before you cross a street in London, you must look to          .

A.the right side                                         B.the left side

C.the left first and then the right                 D.the right first and then the left

(    )62.When you drive a car in England, you must           .

A.drive on the left                                     B.drive on the right

C.ignore the traffic lights                           D.go very quickly

(    )63.If the traffic lights are green, the traffic         .

A.can go               B.must be careful          C.mustn’t cross     D.must stop

(    )64.In England you can see some buses           .

A.with two chairs  B.with two rooms         C.with two floors   D.with two drivers

(    )65.Which of the following is right?

A.After you cross the street, you must look to the left first and then the right.

B.If the lights are red, the traffic mustn’t stop.

C.You must drive cars on the left in England.

D.In the morning and in the evening when people go to or come back from work, the traffic is not dangerous at all.