There was a small village near the mountain. There were a lot of trees in the mountain. People in the 1always got something from the mountain, such as animals and trees. When they wanted to 2a house, they cut down the trees. And they also killed the animals for 3. Trees were very 4in their daily life. They made tables, chairs 5beds by cutting down the trees. In addition, when they 6meals, they still used some trees for wood. However, they only cut down trees but 7planted new trees. So the trees were fewer and fewer and the animals were becoming 8as well.
One summer, it rained 9in the village. The rain lasted for about a week. The soil and the stones on the mountain fell down and soon 10the whole village. They finally realized they couldn't only cut down trees but also needed to protect them.
Can trees talk? Yes, but not in words. Scientists have reasons to believe that trees do communicate with each other. Not long ago, researchers learned some surprising things. Some caterpillars(毛毛虫) attacked a willow tree(柳树) in the woods. The tree changed the chemistry of its leaves and the leaves tasted so terrible that the caterpillars stopped eating them. Then even more surprising, the tree sent out a special vapour (蒸气) a signal causing its neighbours to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn't need to be always in words. We can talk to each other by smiling, raising our shoulders and moving our hands. We know that birds and other animals use a whole vocabulary of songs, sounds and movements. Bees dance their signals, flying in certain patterns that tell other bees where to find nectar(花蜜) for honey. So why shouldn't trees have ways of sending messages?
Hello! I'm Bob. Welcome to my classroom. It is very big and new.
There are 18 girls and 23 boys in my class. In the front of the classroom there is a teacher's desk. On the teacher's desk there is a box of chalks and a blackboard eraser. And a tape player is on it too. The tape player is Miss Green's. She is my English teacher. She comes from England, but now she teaches us in China. We all like her very much. Look! A map of China is on the wall. Four nice pictures are on the wall too. A basketball is behind the door. I often play it with my classmates after class.
I like my classroom very much.
| John Smith's travel | |||
| 21 August | Leave | New York | 12: 25 |
| Arrive | Ottawa | 14: 20 | |
| 23 August | Leave | Ottawa | 15: 50 |
| Arrive | Toronto | 17: 15 | |
| 25 August | Leave | Toronto | 09: 45 |
| Arrive | Tokyo | 15: 10 | |
| 29 August | Leave | Tokyo | 14: 20 |
| Arrive | Seoul | 16: 05 | |
| 2 September | Leave | Seoul | 08: 20 |
| Arrive | New York | 12: 25 | |
The world itself is becoming much smaller by using modern traffic and modern communication equipment(通讯设备). Life today is much easier than it was hundreds of years ago, but it has brought new problems. One of the biggest is pollution. To pollute means to make things dirty. Pollution comes in many ways. We see it, smell it, drink it and even hear it. Man has been polluting the earth. The more people, the more pollution. Many years ago, the problem was not so serious because there were not so many people. When the land was used up or the river was dirty in one place, people moved to another place. They are slowly polluting the whole world.
Air pollution is still the most serious. It's bad for all living things in the world but it is not the only one kind of pollution. Water pollution kills our fish and pollutes our drinking water. Noise pollution makes us angry more easily.
Many countries are making rules to fight against pollution. They stop people from burning coal in houses and factories in the city, and from putting dirty smoke into the air.
Pollution by SO2 is now the most dangerous kind of air pollution. It is caused by heavy traffic. It is sure that if there are fewer people driving, there will be less air pollution.
The earth is our home. We must take care of it. That means keeping the land, water and air clean. And we must take care of the rise in population at the same time.
Dick lived in England. One day in January he said to his wife, "I'm going to fly to New York next week because I've got some work there." "Where are you going to stay there?" his wife asked. "I don't know yet." Dick answered. "Please send me your address from there in a telegram(电报)," his wife said. "All right," Dick answered.
He flew to New York on January 31st and found a nice hotel in the center of the city. He put his things in his room and then he sent his wife a telegram. He put the address of his hotel in it.
In the evening he didn't have any work, so he went to a cinema. He came out at nine, clock and said, "Now I'm going back to my hotel and have a nice dinner."
He found a taxi and the driver said, "Where do you want to go?" But Dick didn't remember the name and address of his hotel. Of course, the driver of the taxi did not know, either.
So Dick got out and went into a post office. There he sent his wife another telegram and in it he wrote, "Please send me my address at this post office."
提示：1）树木在保护环境方面的作用：吸收有害气体，是对抗空气污染的主要斗士；
2）树木在我们日常生活中的贡献：很多家具来自于木材，纸张来自于木材；
3）树木面临的问题。
Dear students,
As we all know trees are very important in our lives. We can't live in the world without trees.
Thank you very much for your listening.
