Have you ever seen people building houses? To build a house, you need workers. They use their hands, tools (工具) and machines to put things together. In fact, building the ISS(国际太空站) is the same. The difference is that the workers are astronauts. They walk in space and use robots' arms and hands to do their work.

   In the space station, astronauts always feel easy, because the temperature there is always about 21℃. But outside the station, it can be too hot or cold for people, In the sunlight, it's about 120℃; in the shadow of the station, it's about -85℃. So when astronauts walk in space, they have to wear heavy clothes — spacesuits. These special clothes can make the astronauts feel as comfortable as in the space station.

  Spacesuits also keep astronauts safe from flying rubbish (垃圾) in space. Each time people go into space, they leave rubbish there. So astronauts should be careful because there's a lot of rubbish—some rubbish goes many times as fast as a plane!

   Space walking is not easy, and it can be dangerous. So getting ready for it takes a lot of time to learn. Astronauts will need to do 160 space walks to finish their work in the ISS. That will take about 1,900 man-hour of work.

You-yes, you!—can help keep people from getting sick this flu season. How? It’s not too hard. Just take these steps:

◆Wash your hands often, especially before eating and after coughing or blowing your nose.

◆Keep your coughs to yourself(use a tissue instead of your hand).

◆Keep your hands out of your eyes, mouth, and nose.

You may have heard all these before, but flu season is a great time to really start doing them. By following these pieces of advice, you might be able to keep yourself from getting sick and stop germs from spreading around and making other people sick.

So your hands are very important. A lot of germs get in our bodies from there. Germs get on our hands and we put our hands in our eyes, noses, and, especially, our mouths.

How to stop germs? Yeah, hand washing. You might pick up germs here and there. So when you wash your hands, you wash away germs.

But how to wash your hands? That’s easy: wash your hands with soap and warm water (not cold or hot). Don’t forget to wash around your fingernails. This is one place germs like to be. Wash for about 15 to 20 seconds—about how long it takes to sing “Happy Birthday” twice.

Foggy weather (雾霾天气) always makes people uncomfortable. When it comes to our health, it becomes more dangerous. When winter comes, we see a lot of foggy days in North China. The air is very bad for our health. The government decided to fight air pollution until the end. On December 5^th, the Ministry of Environment Protection made a plan for cutting down air pollution for the coming years. According to this plan, China tries to cut the PM 2.5 pollution at least 5% by 2018 in117 cities. Human activities are the biggest reason of the PM 2.5 pollution, especially like motor vehicle emissions (机动车排放物).

      Health experts say that smaller particles (颗粒) are far more dangerous and may get bad results on hearts and other important parts of our bodies. They can not be stopped in our nose, so they can travel into our bodies.

“The beginning of the plan is to improve air quality and solve the PM 2.5 problem. This problem has a bad result to many people,” said Zhao Hualin who works for the ministry. He added that the key point is to protect people’s health.

To finish the five-year-plan, China will use clean energy (清洁能源). At the same time, the country will use more city buses and subways to control the number of new cars.

My name is Paul Miller. I was too fat before, but now I do not have this problem. My doctor tells me to jog(慢跑). So I run for two miles before breakfast early every morning. I do not run fast, but I do not stop to rest.

People call me a jogger. There are many joggers on my street. We often run together in the park or along the road. Jogging helps to keep us strong and healthy.

Jogging is very popular in the United States. People like to feel well and look nice. Some people do not jog, but they do not get fat. They work hard on their jobs and they do not need to run before they go to work.

Do you want to jog? Go to your doctor first. Your doctor can tell you something about jogging. My doctor tells me to eat only three meals a day. I feel healthy and my doctor is happy because I jog every day and I do not eat anything before or after meals.

Many parents today worry about their children's diets. Then what is a healthy diet for children? Miss Jones from Happy Children Hospital gives the following advice:

   Children shouldn't eat food with too much salt, because it can cause high blood pressure(高血压)

   Children should eat food with less fat, oil and sugar. They should not eat too much junk food.

   Fruit and vegetables are rich in vitamins(维生素). Children need to eat fruit and vegetables often.

   Water is important to everyone. Children need to drink enough water every day.

   Children need to eat breakfast every day. It is good for their bodies and minds.

I’m a middle school student from America. I live far away from my school. So I often go to school by bus. It takes me about twenty minutes from my home to school.

But at my school and other schools in our town, there is a “Walk to School Day”. It is on Wednesday every week. On that day, parents send their kids to a bus stop. There are many bus stops in our town. At each bus stop, two adults lead us to walk to school together.

“Walk to School Day” stops us taking cars or buses. That is good for the air and we can get exercise too. On the way to school, we talk to each other. We can also make new friends. I like “Walk to School Day”. I walk about five kilometers with other students on that day. Our school will give some students beautiful backpacks if they do well. And I got one last year.

Many parents today worry about their childrenˈs diets. Then what is a healthy diet for children? Miss Jones from Happy Children Hospital gives the following advice:

◆Children shouldnˈt eat food with too much salt, because it can cause high blood pressure(高血压).

◆Children should eat food with less fat, oil and sugar. They should not eat too much junk food.

◆Fruit and vegetables are rich in vitamins. Children need to eat fruit and vegetables often.

◆Water is important to everyone. Children need to drink enough water every day.

◆Children need to eat breakfast every day. It is good for their bodies and minds.

Everyone knows that exercise is important. We need to exercise. Doctors say it is good for us. It keep our bodies strong. When the daytime comes, we must get up. This is the time for exercise. Exercise means doing things with the body. There are many ways to exercise. You can walk, run, swim, skate, or play ball games. Make sure you excise in the following ways: you have to like what you’re doing. Exercise enough---but not too much. It is good to exercise twice each week. Thirty minutes each time is enough. Try all kinds of things until you find one, two or three sports that feel right for you.

Exercise can be fun. Friends can exercise together at fitness center, or they can play sports together. How do you exercise? 

A recent(最近的)report from Dazhou Daily says about 18％ of Dazhou teenagers can have problems with their minds. Some students become worried because they have to study very hard. Others find it difficult to get on well with people like their parents and classmates．

Zhang Qiang, a Junior 2 student from Dazhou, could not understand his teachers in class and was doing badly in his lessons．He was afraid of exams. When he looked at the exam paper, he couldn’t think of anything to write．

Another student, a 15-year-old girl called Wu Yan from Guang’an often argued with her classmates even her parents because of some different ideas. She became so annoyed about them that she started to hurt herself with a knife．

However, many students who have problems won’t go for advice or help. Some think they will look stupid if they go to see a doctor. Others don’t want to talk about their secrets.

In order to solve the teenagers’ problems, here is some advice:

● Talk to your parents or teachers often．

● Take part in group activities and play sports．

● Go to see a doctor if you feel unhappy or unwell．