What do you do if you're stranded（处于困境的）on a lonely island? Surely you need to find a way to get in touch with the outside world. Your best chance of doing this is to draw the attention of a passing plane.
　　Body signals（信号）
　　Pilots from different countries understand body signals if they have the correct training. When you wave your arms up and down in a straight line, it means "yes". When you point downwards and swing your arm from side to side, it means "no". If you want the pilot to know that it's safe to land, push your hands out in front of you and bend（弯曲）your knees. If you want to say that it's not safe to land, put your arms in the air and move them to one side.
　　Smoke signals
　　The smoke from a fire can be seen from far away, so it's a good way to draw attention. If the weather is dry, it isn't hard to start a fire. Remember, however, that fires can be very dangerous if they get out of control. Never light a fire unless you're sure that it can't spread. If the ground is dark, light smoke can be seen more easily. Green grass and leaves produce light smoke.
　　Ground-to-air signals
　　It's a good idea to build some signals, too. Use large pieces of wood to make the symbols(标记). If you can't find any wood, use earth. Some useful symbols are:
　　F "I need food and water."
　　II "I need medicine."
　　I "I am badly hurt."
　　X" I am unable to move from here."
　　Pilots' replies
　　If the pilot lowers the plane's wings from side to side, this means "message received and understood". (At night, the pilot flashes the plane's green lights.) If the pilots flies the plane in a clockwise circle, this means "message received but not understood".(At night, the pilot flashes the plane's red lights.)
However, there is no signal which means "message not received". Why not?
【小题1】 Which picture means "it's not safe land"?

　
【小题2】 What can we learn from the passage?

阅读下列邮件，然后根据要求写一封回信。

Dear Yang Fen,

　　Now I am new here. I can't understand what the English teacher says, and I am afraid of talking with the classmates here. But the biggest problem for me is that I can't sleep the night before a big exam. Could you help me?Yours,Wang Lin要求：请根据王林的困难，运用以下句型给出建议。 80词左右。开头和结尾已给出，不计入总词数。

● You should ...

● Why don't you ...

● If I were you, I would ...

Dear Wang Lin,

　　I'm glad to hear from you. I have some suggestions that may help you.

I hope you will do better in English and get along well with your new classmates.

Yours, Yang Fen

Hi Jerry,
　 Thank you 1 your invitation to 2 your school next week. I am sorry I 3  come. I’m not going to be 4 next week. On Monday, I have a piano lesson 5 8:00  5 10:00 in the morning, and I have to study for the English test in the afternoon. On Tuesday, I am  6 a friend from my hometown at the airport. On Wednesday, I am  7 tennis with my friends. I have to look after my  8 grandpa on Thursday. On Friday, I’m helping one of my classmates 9  his English. I am busy  10 week.

Hi Jerry,

　 Thank you 1 your invitation to 2 your school next week. I am sorry I 3  come. I’m not going to be 4 next week. On Monday, I have a piano lesson 5 8:00  5 10:00 in the morning, and I have to study for the English test in the afternoon. On Tuesday, I am  6 a friend from my hometown at the airport. On Wednesday, I am  7 tennis with my friends. I have to look after my  8 grandpa on Thursday. On Friday, I’m helping one of my classmates 9  his English. I am busy  10 week.