根据短文内容及首字母提示，填写所缺单词。
How can we students keep ourselves safe? Here are some tips.
On your way home or to school: Wait for the green traffic light, and look left and r    before you cross the road. If you see a car coming, don’t cross until it is really safe. Dress in bright colors, so the d     can see you clearly.
At school: When students around you begin to push, try to hold onto something, or stay in a safer corner. If you fall d     in a crowded place, cover your head with b   hands.
When there’s a fire: Stay c   and leave quickly. Use a piece of wet cloth to cover your mouth and n     so that you don’t take in smoke . If your clothes catch fire, please drop to the ground and roll from side to side to put out the fire.
For eating: Wash f     like apples or grapes carefully before you eat them. Check the expiration dates（保质期）and if your food looks or smells t  , don’t eat it.
For riding on the escalator（自动扶梯）: Hold onto the handrails（扶手）. It is d     to run up and down on them. You may fall down b   escalator steps（台阶）are not fit for running.
Remember these tips as they may help you when you have difficulties.