英语高手来，六年级英语题，急急急急！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！

There are many busy streets in Shanghai.During the holidays the streets are full of people.B___,cars and trams m___slowly along the streets.People can't walk quickly.When there is a red man,they w___on the pavement.O___cars,buses and trams can go.When there is a green man,they cross the road.Peoplec___park their cars in the street.When people cross the road,they always look left than right.They can't play in the street.
横线上填一个词，首字母已给

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