Noise pollution is doing much harm to our health now. Noise, in fact, is unwanted sound and is a kind of invisible (无形的) killer. More and more students enjoy listening to music very much. When they listen to MP3 players, they like to turn up the volume (音量). Some people love listening to loud music. Furthermore, while watching TV, they keep the volume up. But they haven't realized that the noise is weakening their hearing. In fact, the noise not only influences each member in the family, but also makes a difference to the comfort of neighbors.

Noise pollution is a source of increasing misery (痛苦) to people in our society. If people are often disturbed by it, they may feel uncomfortable or upset. What's worse, the noise can make people mad sometimes. If a worker works in a printing factory for too long, his/her hearing loss is much faster than a common person working in a quieter environment. So everybody must pay more attention to noise pollution. Generally speaking, the following four types of noise should be watched out for:

    ◆Noise in the street

    ◆Construction site (建筑工地) noise

    ◆Noise at work

    ◆Transportation noise

    I think the local department (部门) should take measures to control the noise levels, but it's everybody's duty to keep a quiet environment.

    DNA is the whole" map" of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.

    People have been trying to understand the human body for a long time. In 1860, Mr. Mendel discovered why we look the same as other people in our family. It is because of small things called "genes" (基因)in our body. In 1953, two scientists, Watson and Crick, found out that genes are really messages. They're written in the DNA with a special language.

    In 1961, another two scientists found the first" word" that they could understand in that language. It shows how DNA tells the cell(细胞)to build its parts. So far, scientists have found all the words in the DNA map, but we still don't understand what they all do. By understanding what just one" word" means, we can help to save people from several illnesses. So the more we understand, the more doctors will be able to do.

    Most people hope that this can help to make better medicine to help sick people. Other people worry that when we learn more" word" and find out more information, we will use it in the wrong way. Just to make people more attractive, or stop sick people getting jobs.

Making your school a better place will make everyone around you happier and will get you more exited to go every day. Besides，a better place will also make you more productive（有效益的）. The following are some of the ways to make your school a better place. 

◆{#blank#}1{#/blank#}Do not stay silent when you see another student getting hurt by others. Speak up bravely and tell them to stop. This will help create a better atmosphere（气氛）at school. 

◆Try to deal with arguments between other kids. When you see other students in an argument，you can help deal with the problem. {#blank#}2{#/blank#}After all，many argument s in school are just misunderstandings between two people. 

◆{#blank#}3{#/blank#}If you know that other students have difficulty learning a subject that you're good at，you can help them by teaching them in that subject. Helping other students to improve their grades will help create a positive atmosphere in school. 

◆{#blank#}4{#/blank#}If you notice a student who doesn't have many friends or sits alone at lunch，make it a point to become their friend. {#blank#}5{#/blank#}So why not encourage other people to become friends with them？

Nowadays, more and more people like to travel in their holidays. I have read a report about the1 people spend their holidays. It is reported that in recent years several new holiday habits(习惯) have 2 . Among them, the most3 one is the growth of holiday camps. 

From the report we can see that, in 1990, forty percent of people stayed at home for their holidays. However, now the percentage has 4 to nine percent. More people go out for fun. People enjoy the 5 air, clean water and green hills when they go camping in places far from the city. In 1990, thirty－eight percent of people6 going to the seaside. However, in 20027 twenty seven percent were interested in going there. What great8 !

Why have those changes9 ? I think there are several reasons. First, it's because people can afford to travel. Second, people prefer to live a high-quality and colourful life. Third, their attitudes(态度) to relaxation have 10 changed. Fewer and fewer people want to save much money by living a simple life. 

Have you ever read the cartoon books The Adventures of Tintin? There are many stories in the books. Each is about an exciting trip of a young reporter named Tintin. When Tintin is on the road, his best friend, a dog named Snowy, is always by his side. Sometimes the two travel around the world. Sometimes they go with their friends.

Tintin, Snowy and their friends aren't real. But thanks to the writer, Georges Prosper Remi, they look quite real.

 Born on 22 May 1907, Georges Prosper Remi was a famous cartoon writer and an artist from Belgium.From an early age, he liked to draw pictures very much. Later he created a new name for himself. It was Herge. From then on, he always signed his works not with his real name—Georges Prosper Remi, but with this new name—Herge.

The series first came out in French on 10 January 1929. Herge thanked French illustrator(插图画家) Alain Gree so much. Once Herge travelled to Paris to meet Alain Gree and asked for some advice. Then the two became good friends.

In 1979, Herge got a serious illness. Later his illness became more and more serious. Herge died on 3 March —1983. His death received front— page coverage in many newspapers. Although Herge passed away, his works are still loved by people from all over the world.