Accidents often happen. It's necessary (必要的) for us to know these things.
On your way home or to school: Wait for the green traffic light, and look left and right before you cross the road. If you see a car coming, don't cross until (直到) it really stops.
At school: Never run around too fast at school. When students around you begin to push, try to hold something. If you fall down in a crowed (拥挤的) place, cover (覆盖) your head with both hands.
When there's a fire: Keep quiet and leave quickly. Use a piece of wet cloth to cover your mouth and nose so that you don't breathe in smoke. If your clothes catch fire, drop to the ground and roll (滚动) from side to side to put out the fire.
About strange invitations (邀请): If an "Internet friend" asks to meet you, tell your parents about it. Don't go by yourself.
