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　Mark Twain, the famous American writer was travelling in France. He　1　by train to Dijon. He was tired and 　2 　to sleep. He asked the conductor（乘务员）to 　3 　when the train 　　4 to Dijon. But first he explained he was a very heavy sleeper.“I probably will protest loudly when you 　5 　to wake me up,” he said to the conductor. “But do not take any notice, just 　6 　me off the train.”

　Then Mark Twain went to sleep. Later, when he woke up, it was night time and the train had reached Paris already. He realized at once that the conductor 　7 　to wake him up at Dijon. He was very 　8 　. He 　9　 to the conductor and began to 　10 　him. “I was never so angry in all life.” Mark Twain said.

　The conductor looked at him calmly “you are not half so angry as the American I put off the train at Dijon.” he said.

在A、B、C、D中选择最佳答案以完成短文：

If you get into the forest with your friends, stay with them always. 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. 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 noise for fun. They will let you know that they have heard your signal. They give you two shouts, two whistles, or two gun-shots (枪声). When someone gives you 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---cover up to the holes with branches (树枝) with lots of leaves. Make yourself a soft bed with leaves and grass.

　　What should you do if you get hungry or need drinking water? You would have to leave your little 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. The most important thing to do when you are lost is—stay in one place.

1.If you lost in the forest, you should _______.

A. stay where you are and give signals three times

B. walk around the forest and shout so that your friends could hear you

C. try to find your friends as soon as possible

D. try to get out of the forest and shout for help

2.If you want to let people believe that you are not just making noise for fun, you should _____________.

A. tell people that you are lost?????

B. keep up shouting or whistling

C. shout at the top of your voice????

D. shout or whistle three times

3.When you hear two shouts, or whistles, or gunshots, __________.

A. you should shout more loudly??????

B. you can whistle three times

C. it is an answer to your call for help??

D. you should try to run to them

4.When you want to leave your place to get drinking water, you should ________.

A. just go to the river

B. find some glasses or bottles before you go

C. make a fire so that you can have some tea

D. leave marks so that you can find your way back

5.This passage mainly tells you __________.

A. when you hear a signal always three times, it is a call for help

B. What you should do if you get lost in a forest

C. any signal given twice means an answer to a call for help

D. how you can live longer in a forest