导读：Theroadsinourcityareusuallyverybusy.Therearealotofcars,trucks,vansandbusesonther...

The roads in our city are usually very busy. There are a lot of cars, trucks, vans and buses on the road. So, we must remember the rules on the roads.

We must walk at the zebra crossing. We must be twelve years old if we want to ride bikes. We mustn't play football, skate or fly kites on the roads, it's very dangerous. We mustn't throw rubbish outside the cars.