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?

Hello, I’m Vladislav. For my summer holidays, I usually stay in a country house near Moscow.
Last summer, my dad’s brother gave me a present — a blue bike. At that time I couldn’t ride it very well.
One day I got into an accident. But don’t worry, everything was OK, just some “little” injuries.
That day, I tried to ride my bike and suddenly it began to move very fast. I couldn’t stop the bike. So I fell into a ditch (沟) full of dirty water. When I thought I had had enough bad luck, a girl walked by. She saw the bike and me. I quickly stood up.
“Are you fishing here?” she asked.
“Yes,” I answered. Then I said, “I’m making fish soup for dinner. Would you like to come?” To my surprise, she agreed.
After that we became friends. Now, we often send each other e-mails. She knows that I’m studying in China and she asks me questions about Chinese culture. I tell her my stories of China, and she says she wants to visit China, too. She even plans to study Chinese.
This is how, with the help of my bike, China got one more Russian friend.
根据短文内容，回答下列问题。
【小题1】Who sent Vladislav a bike last summer?
　　　　          　　　　　　　　  
【小题2】What happened when Vladislav tried to ride his bike?
　　　　          　　　　　　　　  
【小题3】 What did the girl think Vladislav was doing when she saw him by the ditch?
　　　　          　　　　　　　　  
【小题4】What made Vladislav surprised?
　　　　          　　　　　　　　  
【小题5】 What does the girl say she wants to do in her e-mail to Vladislav?
　　　　          　　　　　　　　  

If you look at the sky one night and see something moving and shining that you have never seen before, it might be a comet (彗星).

　　A comet sometimes looks like a star. Like a planet, a comet has no light of its own. It shines from the sunlight it reflects (反射). Like the earth, a comet goes round the sun, but on a much longer path (轨道) than the earth travels.

       If a comet isn’t a star, what is it then?

　   Some scientists think that a large part of a comet is water frozen into pieces of ice and mixed with iron and rock dust and perhaps a few big pieces of rock. When sunshine melts (融化) the ice in the comet, great clouds of gas go trailing after it. These clouds, together with the dust, form a long tail.Many people perhaps have seen a comet. However no one knows how many comets there are. There may be millions of comets, but only a few come close enough for us to see.

　　An Englishman named Edmund Halley, who lived from 1656 to 1742, found out a lot about the paths that comets take through the sky. Some comets move out of our sight and never come back. Others keep coming back at regular times. A big comet that keeps coming back was named after Halley because he was the one who worked out when it would come back again. Maybe you have ever seen Halley’s Comets because the last time it came close to the sun and the earth was in the year 1986. Then people all over the world were outside at night to look at it. You will probably be able to see Halley’s Comets when it comes near the earth again.

1.A comet is like ________.

A. sun      B. moon     C. sunlight    D. the earth

2.A large part of a comet is ______.

A. water and rock

B. water frozen into pieces of ice and mixed with iron

C. ice, iron and rock dust

D. only a few big pieces of rock

3.Maybe many people _______.

A. haven’t seen any comets      B. have seen all comets

C. have seen a comet at daytime  D. have seen a comet

4.Some comets keep coming back ________.

A. at any time  B. at noon  C. at regular times  D. at daytime

5.Halley’s Comets came back _____.

A. in 1990    B. in 1980     C. in 1986      D. in 1989

Hello, I’m Vladislav. For my summer holidays, I usually stay in a country house near Moscow.

Last summer, my dad’s brother gave me a present — a blue bike. At that time I couldn’t ride it very well.

One day I got into an accident. But don’t worry, everything was OK, just some “little” injuries.

That day, I tried to ride my bike and suddenly it began to move very fast. I couldn’t stop the bike. So I fell into a ditch (沟) full of dirty water. When I thought I had had enough bad luck, a girl walked by. She saw the bike and me. I quickly stood up.

“Are you fishing here?” she asked.

“Yes,” I answered. Then I said, “I’m making fish soup for dinner. Would you like to come?” To my surprise, she agreed.

After that we became friends. Now, we often send each other e-mails. She knows that I’m studying in China and she asks me questions about Chinese culture. I tell her my stories of China, and she says she wants to visit China, too. She even plans to study Chinese.

This is how, with the help of my bike, China got one more Russian friend.

根据短文内容，回答下列问题。

1.Who sent Vladislav a bike last summer?

2.What happened when Vladislav tried to ride his bike?

3. What did the girl think Vladislav was doing when she saw him by the ditch?

4.What made Vladislav surprised?

5. What does the girl say she wants to do in her e-mail to Vladislav?

选词填空