V . 完形填空: In China, safety education is very important now. 46 should students do to keep themselves safe? What are the 47 at school? Take a look. Stampedes (踩踏 , earthquakes and fires are the main accidents at school. A stampede always happens in 48 places. If you 49 in the crowd, move to one side and protect your head with your hands around. When earthquakes happen, you can get 50 a desk quickly and hold on. If you are 51 , find a place away from buildings etc. When there’s a 52 , leave the classroom quickly. Smoke makes them 53 and they can’t breathe. It’s better to put 54 over your mouth and nose. 55 when you want to get out, you should make yourself close to the floor to breathe some fresh air.