1. 根据短文内容, 选择正确答案。

    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 given twice, it is an answer to a call for help.

    If you don't mind that you will get help before night comes, try to make a little house with branches. Make yourself a bed with leaves and grass.

1. （1） If you get lost in the forest, you should ______.

   A . walk around the forest to find your friends B . stay in one place and give signals C . climb up a tree and wait for your fiends quietly D . shout as loudly as possible
3. （2） Which signal a call for help?

   A . Shouting once as loudly as you can.      B . Crying twice. C . Shouting or whistling three times together.     D . Whistling everywhere in the forest.
5. （3） When you hear two shouts or two whistles, you know that ______.

   A . Someone finds something interesting B . people will come and help you C . someone needs help D . something terrible will happen
7. （4） Before night comes, you should try to make a little house with ______.

   A . stones B . earth C . leaves and grass D . branches