阅读短文，选择正确的答案填空。

　　When you are in England, you must be very careful in the streets because the traffic drives on the left．Before you cross a street, you must look to the right and then 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(危险的)then．When you go by bus in England, you have to be careful(小心), too．Always remember the traffic moves on the left．

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