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If you go into the forest with friends, stay with them. If you don't, you may get lost. If you get lost,
this is what you should do. Sit down and stay where you are. Don't try to find your friends - let them
find you. You can help them find you by staying in one place. There is another way to help your friends
or other people to find you. You can shout or whistle three times. Stop. Then shout or whistle three times
again. Any signal given three times is a call for help.
Keep up shouting or whistling. Always three times together. When people hear you, they will know
that you are not just making a noise for fun. They will let you know that they have heard your signal.
They will give you two shouts or two whistles
. When a signal is given twice, it is an answer to a call
for help.
If you don't think that you will get help before night comes, try to make a little house with branches.
Make yourself a bed with leaves and grass.
When you need some water, you have to leave your little branch house to look for it. Don't just walk 
away. Pick off small branches and drop them as you walk in order to go back again easily. When you are
lost, the most important thing to do is to stay in one place.
1. Which signal is a call for help?
A. shouting here and there
B. crying twice
C. whistling everywhere in the forest
D. shouting or whistling three times together
2. When you hear two shouts or two whistles, you know that _______.
A. someone is afraid of an animal
B. someone needs help
C. people will come to help you
D. something terrible will happen
3. What's the meaning of the underlined sentence?
A. Pick off branches to build another house
B. Leave branches to find your way back
C. Use branches to make a bed
D. Drop branches to look for water
4. The main idea of the passage is _______.
A. what you should do if you are lost in the forest
B. how to travel in the forest
C. what you should do if you want to get some water
D. how to spend the night in the forest
