1. (2021六下·盐城期中) 完形填空。

When you are in the UK, you must be very careful in the streets. Because the traffic drives   1   the left.   2   you cross a street, you must look   3   first and then left. When you go by bus in the UK,  you have to be   4   too. Always remember the traffic moves on the left. So you must be careful. In the morning and in the evening,  when people go home from work, the streets are   5  .