阅读下面短文，根据其内容，从方框中选择适当的单词填在标有题号的空白处，使语意通顺、完整．（每空一词，切不可重复使用）
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Make yourself know the type of ____ you are standing on. Wet or uneven（不平坦的）ground can cause you to ____ down in a crowd of moving people.
If you find ____ in the middle of a moving crowd, you must be careful. Do not walk ____ the moving direction and do not stop or sit down, because you could get trampled (踩踏) ____ Instead, move in the same ____ of the crowd. Keep your____ up by your chest（胸部）to protect your chest. If you fall down, get up quickly, If you can't get ____ , ask someone to pull you back up. If you have kids, lift ____ up.
If you fall and cannot get up, keep on ____ in the same direction of the crowd. If that is not ____ , then cover your head with your arms.
Try to get away from hard things in a crowd. If you're pushed against them, ____ a result, you may be hurt badly.
We should learn to ____ ourselves. Stay away from the crowd.
Remember: Whatever you do, safety is first!
