根据下列短文内容，在短文的空格处填上一个恰当的词，是短文完整、通顺。
What are you going to do if you are in a burning house? How will you escape? Do you know how to    yourself? Please read the following passage.
Escaping a fire is a serious matter. Knowing     to do during a fire can save your life. It is important to know the      you can use and show them to everyone in the family, such as stairways and fire escapes, but not lifts.
From the lower floors of the buildings, escaping      windows is possible, the second floor window is usually not very high from the ground. Though it’s a little dangerous, it is    to jump a short way than to stay in a burning building.
Windows are also useful when you are       for help. Be sure to keep the door     . Or smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than     that may leaked into the room.
On a second or third floor, the best windows for escape are those that open onto a roof . From the roof of a person can drop to the ground more easily.