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.

      Andrew Holleman, a 12-year-old boy, loved playing in the open land near his home. The land was wet and forested, and made a home for birds, other animals and many different plants. It made the perfect place for him to study and get to know the nature. He had seen some red-tail hawks, red foxes, wood turtles and other animals. He also found special native flowers.

      Suddenly it was announced that the “empty” land would be improved by a lot of houses on it. The plants would be removed, the animals would run away and most would probably die. Then the wet soil(土壤) would be covered with extra grounds. When he heard about the news, he was not happy. He was very worried that the land and water would be polluted.

      Andrew wrote down clearly all the research he had done about the area, and how the houses would affect the local environment. He sent letters to members of local government and television reporters. He also called on his neighbors to oppose the building of the houses.

Although he was only 12 years old, he had the courage and wisdom of a person much older. Andrew's teachers described him as gentle, shy and active. His classmates also admired how much he knew about local animals and plants and the environment. Each day after school, Andrew went door-to-door, to ask the people to sign, who did not want the houses to be built. In only one month, he got the signatures of 250 people. In the end, the land remained a safe place for birds, animals and plants that belonged there.

      Andrew won many prizes for his brave and great work to stop the houses being built, and thus help save the environment.

    Today some people call Amsterdam the "City of Bicycles" because it is a city which is flat and convenient（方便）for bicycles.

    In the 1960s, a group of cycling fans1an idea . They believed that it would be better for everybody if only bicycles were allowed in the city centre. They were2that this would help to save energy, reduce pollution and provide free public transport. The group painted hundreds of bicycles3and placed them in public places around Amsterdam for people to use.4was allowed to take them and use them for short journeys, whether he was a local or a foreigner, Wherever someone finished a journey, they would5the bike there for someone else to use. The problem was that it didn't work-thieves took all the bicycles6 weeks!

    7,more than thirty years later, the "white bike" is back in town-this time with a computer chip(芯片)to8 its every move! To take a bicycle, you have to put a special card inside. The new "White bike" is not white any more but is an unusual9with bright colours. The bikes are parked at special parking places and people who want to use them have to take them to another place that has enough room.

    There is already less traffic in central Amsterdam, 10 both locals and tourists have been using the white bikes. Thanks to the good ideas of lots of people, like the cycling fans in the 1960s, many people around the world have been enjoying city centre streets without cars for many years.

    If you have your own Acme Rocket Launcher, you can create and send up rockets that show off your personality and creativity.

    All you need is your Acme Rocket Launcher and a few simple household materials:

    ★a 500ml plastic cola bottle     ★scissors     ★colored markers

    ★poster board     ★glue

What to do:

Step 1     Clean the cola bottle completely and allow it to dry.

Step 2     Use markers to draw three small triangles (三角形) and one large triangle on the poster board. Cut out the triangles.

Step 3     Roll (卷起) the large triangle so that two of its sides touch and it forms a rocket's nose cone. Glue the sides of the cone so that it holds its shape.

Step 4     Glue the nose cone to the bottom of the bottle to make the top of the rocket.

Step 5     Glue the smaller triangles to the other end of the cola bottle, around its opening. The triangles will be the tail fins.

    Follow the launching instructions included with your Acme Rocket Launcher and have a blast!

I often hear some students say English is difficult, and it gives them a headache. But English is very easy for me. I' m good at it. I' m very glad to tell you something about how I study English.

First, I think an interest in English is very important. When I learned English first, it was fresh for me. I was interested in it, so I worked hard at it. Soon we had an English exam and I got a very good mark. How happy I was! After that, I learned English harder and harder. Our English teacher often teaches us English songs, and the songs sound nice. I often think how interesting English is!

Second, I think English is a foreign language. I should learn it well in the following ways: Listen to the teacher carefully, speak bravely, read aloud and have a good vocabulary. Then practice again and again, never be tired. And I also have a good habit: Asking whenever(不论何时)I have a question. I must make it clear by asking our English teacher. How happy I am when I understand!

Besides this, I often read English stories, jokes and easy novels. They help me understand a lot of things. So to do more reading is an important way to learn English well. And I also write English diaries. English has become a close friend of mine.

提示：

1.学生使用网络用语的原因.

2.学生使用网络用语的不良影响。

With the increasing popularity of Internet words, more and more students like to use them frequently. Students are even starting to use Internet words such as"YYDS, juejuezi"in their homework.