根据短文内容，判断下列句子正误。

    When you are in England, you must be very careful (小心) in the streets because cars drive on the left. Before you cross a street, you must look to the right first and then to the left. If the traffic lights are red, the cars must stop, then the people on foot can cross the road carefully. If the lights are green, the cars can go on, and people on foot must not cross.   

    In the morning and evening, when people go to or from work, the streets are very busy.

    When you go by bus in England, you have to be careful, too. Remember that the cars move on the left. So you must be careful. Have a look first, or you will go the wrong way. In many England cities, there are big buses with two floors(层). You can sit on the second floor.