阅读理解，根据短文内容，回答下列问题。 Have you ever been to the forest alone or with your friends during your holiday? If you go into the forest with your friends, stay with them. If you don't, you may get lost. If you really 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 by staying in one place. There is another way to help your friends or other nearby people to find you. Give them a signal (信号) by shouting or whistling(吹口哨) three times. Stop. Then shout or whistle three times. Any signal given threetimes is a call for help. Keep up the shouting or whistling, always three times together. When people hear you, they will know that you are not just making noise for fun. Theywill let you know that they have heard your signal. They will give two shouts, two whistles or two gun shots(枪声). When someone gives such a signal, 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 branche (树枝). Make yourself a soft bed with leaves and grasses. What should you do if you get hungry or need drinking water? You would have to leave your little branch house to look for a river. Don't just walk away. Pick off small branches and drop them as you walk so that you can find your way back. 1. If you get lost in the forest, you'd better . A. try your best to find the right way out B. walk around and try to find somebody else C. stay in one place to wait somebody for help D. stay in one place and give signals for help 2. You keep up the shouting or whistling three times together . A. to make sure someone else could hear you B. because you can let others follow you C. to let people believe that you ne ed help D. because it is an answer to a call for help 3. If you want to help the people who lost in the forest when you , you should give two shouts, two whistles or t wo gun shots for answer. A. try to find them as soon as possible B. hear three shouts or whistles C. give three shouts or whistles as an answer D. shout first then whistle and shoot at last 4. If you are not sure that you can get help before night comes, you should A. make a little house to stay B. try to find something to eat C. make a soft bed with leaves and grass D. try to find a river to get some water 5. This passage mainly tells us A. what to do when you get lost in the forest B. how to make signals to others in the forest C. what you should eat while in the forest D. how to make a simple house i n the forest