If you go into the forest with friends, stay with them. If you don’t, you may get lost. Sit down and stay where you are. Don’t try to find your friends, but let them find you instead（相反）. You can help them find you by（通过）staying in one place. There is another way to help your friends or other people to find you. You can shout or whistle（吹口哨）three times. Stop for a while. Then shout or whistle three times again. Any signal（信号）given three times is a 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（树枝）. 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（扔下）them as you walk in order to（为了，以便于）go back again easily. When you are lost, the most important thing to do is stay in one place.
If you get lost in the forest, you should               .

A．try to find your friends

B．stay in one place and make signals

C．walk around the forest

D．shout as loudly as possible

Which signal is a call for help?

A．Shouting here and there.

B．Crying and shouting twice.

C．Shouting or whistling three times together.

D．Whistling everywhere in the forest.

When you hear two shouts or two whistles, you know that          .     

A．someone is afraid of an animal.

B．people will come to help you.

C．someone needs help.

D．something terrible will happen.

Which of the following statement is RIGHT?

A．If you get lost in the forest, you should try your best to find your friends.

B．When you hear whistles for twice, that means someone needs help.

C．If you leave branches to look for water, you can find your way back easily.

D．When you are lost, the important thing to do is to cry.

What’s the meaning of the underlined sentence（画线句子）？

A．leave branches to find your way back.

B．Pick off branches to build another house.

C．Use branches to make a bed.

D．Drop branches to look for water.