一道语法填空 When you are in England you must be very careful in t

一道语法填空 When you are in England you must be very careful in the streets 1_________ the tra...
一道语法填空
When you are in England you must be very careful in the streets 1_________ the traffic drives on the left. Before you cross a street you must look to the right first 2__________ then the left. In the morning and in the evening when people go to or come from 3__________, the streets are very busy. Traffic is most 4________ （danger） then.
When you go by bus in England, you have to be careful, 5_________. Always remember the traffic moves on the left. So you must be careful. 6_________ （have） a look first, or you will go 7_______wrong way.
In many English cities, there are big buses 8_________ two floors. You can sit on the 9_________ （two） floor. From 10_________ you can see the city very well. It’s very interesting.求答案