阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
When you are in England you must be very      (care) in the streets because 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     come from work, 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.