问求一篇关于骑自行车的交通事故~~英语作文 初2水平 速度

I have seen a traffic accident last Saturday. while I was on the way to the city library,I have seen a boy that he is on his bike on the car rode.suddenly，a car had cross the rode quickly.and then ,the car have hit the boy who on the bike. the boy has broken his leg.the driver got off and called the police. about few minutes,the police officer had been there.they send the boy to the hospital when the police officer have made the record. what a unlucky day，isn't it ?