选词填空（共15小题；每小题1分，满分15分）
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）

moving     direction    fall      hands      where    protect     yourself        against    as        up     possible     easily     them  thing   ground

What should you do if you are in a crowd（人群）? The first and most important        is to make yourself clear where you are and where the exits are. No matter        you are, make sure you always know how to get out and to be safe.
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!