在森林里迷失该如何自救？

When you travel in the forest, you should stay with your friends, or you might get lost. 
When you lost the way, the most important thing to do is to stay in one place. Don’t try to find your friends. Let them find you. You can shout or whistle three times. Then shout or whistle three times again. Any signal given three times is a call for help. 
When people hear you, they will give you two shouts or two whistles. When a signal is given twice, it is an answer to a call for help.
When you need some water, you have to leave the place to look for it. Don’t just walk away. You can pick off small branches and drop them as you walk. It will help you go back again easily. 

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1.What’s the most important thing when you get lost in the forest?

A To stay in one place.

B To find your friends.

C To look for water.

D To shout and cry.

解析：选A。细节理解题。根据第二段第一句When you lost the way, the most important thing to do is to stay in one place.可知当你迷路时，最重要的是待在原地不动，故选A。

2.Which signal is a call for help?

A Shouting or whistling three times.

B Shouting or whistling here and there.

C Jumping and running.

D Singing and dancing.

解析：选A。细节理解题。根据第二段最后三句You can shout or whistle three times. Then shout or whistle three times again. Any signal given three times is a call for help.可知你可以大喊或吹口哨三次。然后再大喊或吹口哨三次。任何信号发出三次都是求救，故选A。

3.When you hear two shouts or two whistles, it means that_____.

A somebody is fighting with an animal

B people will come to help you

C somebody needs help

D a bear is coming

解析：选B。细节理解题。根据第三段When people hear you, they will give you two shouts or two whistles. When a signal is given twice, it is an answer to a call for help.可知当人们听到呼救时，他们会大喊或吹口哨两次，而当一个信号发出两次时，它就是对呼救的回应，故选B。

4.What should you do when you leave for water?

A Pick off small branches and drop them as you walk.

B Pick off branches to build a house.

C Use branches to make a bed.

D Just walk away to find it.

解析：选A。细节理解题。根据第四段第三句You can pick off small branches and drop them as you walk.可知当你离开去找水的时候，你可以边走边摘下小树枝扔在地上，故选A。

5.What is the main idea of the passage?

A How to travel in the forest?

B How to spend the night in the forest?

C What should you do if you are lost in the forest?

D What should you do if you meet a bear in the forest?

解析：选C。主旨大意题。根据全文可知文章主要介绍了当你在森林迷路时应该做些什么，故选C。