11.完形填空。

In China, safety education is becoming more and more important. Stampedes（踩踏）, earthquakes and fires are the main 1（） of accidents at school. Students need to learn about how to keep themselves 2（） at school.

Stampedes often happen in crowded places. When the people begin to push you, you should stand there and 3（） something. If you fall down in these crowded places, you should protect your head with your hands.

Earthquakes always happen 4（） . If you are indoors（在室内）, you can 5（） under a table or a chair, because it will protect you from being hurt by the falling things. If you are outdoors, you should find an open place and stay away from buildings.

6（） there's a fire, leave the classroom as soon as possible. While leaving the classroom,you'd better put something wet over your mouth and 7（） . In this way, you won't take in the smoke（烟）. In fact, many people 8（） in a fire just because of the smoke. The smoke is full of CO2, and that makes it difficult for people to breathe（呼吸）. So you should make yourself close to the floor and try to 9（） quickly. Then you can breathe the 10（） air.

I hope the advice could be helpful.

1. A. mistakes B. causes C. answers

2. A. strong B. healthy C. safe

3. A. hold B. leave C. forget

4. A. carefully B. quietly C. suddenly

5. A. sleep B. hide C. dance

6. A. When B. Although C. Because

7. A. head B. ears C. nose

8. A. shout B. cry C. die

9. A. take out B. get out C. give out

10. A. warm B. free C. fresh