When you are in England you must be very careful in the streets _______ the traffic drives on the left. Before you cross a street you must look to the right first__________ then the left. In the morning and in the evening when people go to or come from _________, the streets are very busy. Traffic is most ________ （danger） then.
When you go by bus in England, you have to be careful,_______. Always remember the traffic moves on the left. So you must be careful._______ （have） a look first, or you will go _________ wrong way.
In many English cities, there are big buses_________ two floors. You can sit on the ________ （two） floor. From________ you can see the city very well. It’s very interesting.