In China, the traffic keeps on the right. But when you are in England, you must be very careful because the traffic drives on the left. Before you cross a street, you must look to the right and the left. In the morning and in the evening, when people go to or come from work, the streets are very busy. Traffic is the most dangerous（危险）then.
When you are in some English cities, there are big buses with two floors, you can sit on the second floor. From there you can see the city well. It’s very interestingIn England the traffic moves ________When you cross a street, you must look to _________It is ______ to cross the streets in the morning and in the eveningYou can see the cities very well on the ______ floor of the busIn most parts of China, the traffic are on the      

on the right,on the left,in the middle,in the park,on the right,on the left,in the middle,in the park,the front,the right,the left,B and C,the front,the right,the left,B and C,dangerous,interesting,easy,safe（安全）,dangerous,interesting,easy,safe（安全）,first,second,third,fourth,first,second,third,fourth,front,left,right,back,front,left,right,back