What are you going to do if you are in a burning building？How will you escape？Do you know how to save yourself？ Please read the following passage.

Escaping a fire is a serious matter. Knowing what to do during a fire can save you life. It is important to know the ways 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, we can use windows. We should learn the best way of leaving through windows with the least chance of serious injury.

The second floor window is usually not very high from the ground. An average person, hanging by the finger-tips will have a drop of about six feet to the ground. It is about the height of an average man. Of course, it is safer to jump out in a right way than to stay in a burning building.

Windows are also useful when you are waiting for help. Be sure to keep the door closed, 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 smoke that may leaked（渗）into the room.

On a second or third floor, a person can escape through a window that open onto a roof. Then from the roof drop to the ground. Dropping onto cement（水泥）might end in injury. Bushes（灌木丛）and grass can help to break a fall.

1.根据短文内容完成句子填空(每空限填一个单词)。

The passage mainly tells us _____________ to _____________ ourselves if we are in a burning building.

2.根据短文内容完成句子填空(每空限填一个单词)。

   It is possible to escape _____________ _____________from the lower floors of a burning building.

3.根据短文内容完成句子填空(每空限填一个单词)。

     It's _____________ to drop onto brushes or grass than onto _____________.

4.把短文中画底线的句子译成汉语。

5.根据短文内容用一个完整的英文句子（限15个词以内）回答问题。

What does the last paragraph tell us?