6．
阅读下面材料,用不多于1个单词的正确形式填空。
When you are in England you must be very careful in the streets 61 the traffic drives on the left. Before you cross a street you must look to the right first 62 then the left. In the morning and in the evening when people go to or come from 63 , the streets are very busy. Traffic is most 64 (danger) then.
When you go by bus in England, you have to be careful, 65 . Always remember the traffic 66 (move) on the left. So you must be careful. Have a look first, or you will go 67 wrong way.
In many English cities, there are big buses 68 two floors. You can sit on the 69 (two) floor, from 70 you can see the city very well. It’s very interesting.
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