What's the matter?
What's the trouble?
Is there anything wrong?
What's going on?
What's your emergency?你有什么紧急事件?
There occurred a traffic accident.
I witnessed a car accident.我目击了一起汽车意外事故。
A car accident took place/happened.
I saw two cars crash into/barge against/come intocollision with/knock each other.
I want to report a crime.
I want to report a car accident.
Our only resort is to inform the police.
You'd better go to the station and report it.
He was killed.
He was found killed.
He lost his life.
He was shot to death.他被枪杀了。
He was murdered.他被谋杀了。