An old saying goes ”Laughter is the best medicine.”It's true that laughter is really good for our health. So, the next time you're feeling stressed, try to laugh a lot, ①develop a sense of humor and watch funny films.

The Comic Relief charity, an organization that helps people in need, uses laughter to raise money. Every two years in spring, many English people put on a red nose, make a fool of themselves and do "silly” things to make themselves and others laugh. Examples of silly things you can do are:

• Invite friends round to your house to watch funny films. They have to pay to watch the films—those with the most comfortable chairs pay more—and for food and drinks.

• Hold a talent show at school and ask your friends and teachers to sing, dance or tell jokes. Sell tickets for the show to the rest of the school.
• Have a red nose party at your house. All your friends come dressed in red—including red nose—and your serve red food and drinks. If they don't wear red, they have to pay a fine.
  
• Get the students in your school to make funny sculptures(雕塑)using all kinds of materials. Sell tickets to your Red Nose Day exhibition and part of the money goes to Comic Relief.

      The organization has helped people for more than 20 years. And how much have they collected since the first Red Nose Day? Over￡600 million!②             . In New Zealand, for example, people have made big red noses which they put on the front of cars and even buildings.

    Have you ever been to Yellowstone National Park，a national park primarily in the US state of Wyoming（怀俄明州）？At Yellowstone National Park，① ． When they are heated for more than a few minutes，they will break up．

    In Atlanta，the USA，there is a popular restaurant which is very special．In the restaurant，waiters no longer throw uneaten food into litter cans．Instead，② ．

    In America，a new activity known as"zero waste"is becoming popular．It is carried out in schools，cafes，gyms，parks，restaurants and other places．"Zero waste"activity calls on people to produce less litter．It encourages people to reuse whatever they can．

    Although the idea seems a little unrealistic （不现实的），it is necessary．According to a new report，American people produce the largest amount of the litter in the world．Each person produces almost 4.6pounds of litter every day．More than half of the litter which is put into landfills is harmful ． Actually，this is bad for the environment．Besides this，more landfills（填埋场） are needed．

    "Nobody wants to have a landfill lying near his house，"said Jon D．Johnson from the Environmental Protection Agency，which helps to carry out"zero waste"activity．"There are not enough landfills，so we can't put all our litter into them．We should try to recycle it as much as we can．"

    Why do people cry? Scientists say the body produces(产生)tears because it needs them. One kind of tears(眼泪)is for the eye， the other is for the heart. They both work as cleaners. If something else like dust(灰尘)gets into your eye， tears also come into the eye to clean it out. If you are hurt by something，your strong feelings produce some poisonous chemicals(毒素)in your body， and at the same time， tears come out with them. If tears don't help clean out these poisonous chemicals， they will do harm to(伤害)the heart.

    In the United States men have heart problems more often than women do. Doctors say heart problems have something to do with the pressures(压力)of living and working now. Perhaps men have more of these illnesses because they do not cry enough. They need to cry more.

    In fact，you can find many ways of reducing(减少)the pressures to keep fit. Crying is a natural(自然)and physical(生理)one.

    Today, I'd like to tell you something about the history of the United States. The United States covers a large part of North America. After winning freedom from England, it had only 13 states. Each of the states had a star on the national flag. As the nation grew, new states were formed and there were new stars on the flag. For a long time, there were 48 states. In 1959 and 1960, two more stars, standing for the new states of Alaska and Hawaii（阿拉斯加州和夏威夷州）,were added to the flag. Indians were the first people of the land. Many people came from England. It is for that reason that the language of the US is English.

    What is your choice when you (A)feel like eating something between classes:fruit or candy?

    (B)Eating snacks is not all bad. It depends on what you eat and why and when you eat.

    Firstly, (C)记住什么零食是健康的很重要。 Forget junk food and fast food because they are bad for your health.

    Secondly, remember that it's always better to eat for hunger. (D)Never pig out (大吃) just because you feel bored or everyone else is eating. If you do so, you might put on weight.

    (E)Finally, do you know when you should eat snacks? It's not wise to eat snacks while you are watching TV or doing homework. And some doctors suggest(建议) eating snacks two hours before meals, or you will lose your appetite (食欲) at dinner time. Bedtime is not a good time for snacking, either.

    If you pay attention to what you eat and eat smartly, you will live a better life.

    Car Free Day encourages drivers to give up their cars for a day to protect the environment. People from around the world get together in the streets to remind the world that we don't have to; accept the society full of cars. It started from France in 1998. Because of the air and noise pollution, some French young people wanted a day without cars. On September 22nd, people in 35 cities in France didn't use their cars. They went to work or school by bike, bus or on foot. After that, September 22nd became Car Free Day. The first Car Free Day in China was in Chengdu in 2001. The slogan(口号) for the day is "If we, drive for one less day, we can have one more nice day."

    Organized activities are held in many cities on Car Free Day. In Brussels, Car Free Day shall be valid(有效的) for everybody except persons with a special permit(许可证),but they have to slow down to the speed of 30 kilometres per hour. The public transportations are encouraged. The streets are open only to walkers, bicycles and buses from 7:00 a.m. to 7:00 p.m. In Beijing, it asks drivers to leave their cars at home for one day each month and walk or ride a bike to work. More and more people are taking part in the activity. In the first quarter of this year, Beijing only had 52 blue sky days, and you may see haze almost every day! We must do more for Car Free Day as a Beijing driver said, "We may not change the weather, but we can choose not to drive."

    But we do not want just one day and then a return to "normal" life. We should go on with Car Free Day.