Can you imagine astronauts' everyday life in space? They also need to eat,  1 , exercise and relax. They do the same things as us, but they do2 differently.

    On Earth, we put food on a plate and water in a glass. Gravity(重力) holds the food down and keeps the water in the glass.  3 there is almost no gravity in space, so food can float(漂浮) away, and astronauts must eat and drink4  .

    Sleeping is very different in space. Some astronauts like to float in the air, but most like to be in a 5bag. They tie the bag to a wall 6 they won't float away at night. Exercise is very important in space. On Earth, your legs 7 your body, but in space, astronauts float. So they do not use their legs often. This is very  8their legs, so they must exercise for thirty minutes every day.

    After a day's work, astronauts relax. They may listen to music, read, watch films, play games, or talk to their friends and families  9  the radio. Sometimes they just enjoy 10 in the air.

    There are many kinds of pollution around us,1 air pollution, soil pollution, noise pollution and light pollution. They are bad 2our health in many ways.

    Burning gas, oil and coal creates air pollution. It can cause sore eyes and 3 problems.

    With the increase of pollution and the 4 of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many chemicals in the fields. They destroy the soil. So soil pollution has become serious.

    Noise pollution can make people 5 For example, people may lose their hearing if they work in a 6 place for a long time. Too much noise can cause high blood pressure 7

    Working for a long time in strong, changeable light 8 cause some kind of illnesses. It makes people feel 9 and is especially bad for the eyes.

With 10 pollution, our planet will become greener and our health will be better. Let's be greener people.

    Have you heard of STEM education? STEM 1 Science, Technology, Engineering and Mathematics. It means students can learn these 2subjects in one class. And they work on many projects to practice 3 they learn STEM education is very 4 in the US.

    Now more than 600 5 middle schools bring in STEM education, according to the paper, en. Beijing, Yuying School is one of them.

    The school 6 the course in May. It invited college teachers to teach more than 80 students programming, robotics and other interdisciplinary(跨学科}的) knowledge.

    The teaching style is quite 7, Once teachers finish teaching basie knowledge, studentes will practice it 8. For example, after learning about electrie circuits(电路),students are required to design one that could control three lights 9.They have many projects to improve their hands-on 10 as well. Once, they had a "smart home" model design project. All the students competed to design a 11 model and make it "smart" .Liu Tianyou, 12, with 12 teammates, used computer programs and sensors to finish it. "If you open the door of the house, the lights will 13 automatically, "he said. Their work won the third prize.

    The class, develops students' creativity as well. 14 Learning mechanies and programming in the class, Zhao Hngyi, 14, made a Lego robot himself in eight 15.From assembling(组装)to testing he finished it on his own. The robot can catch things and walk on certain tracks under orders. " It's cool to make my idea come to life," he said.

    The Artic Region (北极地区) is one of the coldest place in the world. It is cold all year round. Spring comes from May to June. The ice and 1 begin to melt (融化). The plants begin 2 and the animals look for food. The summer comes from July to August. The temperature is summer can get only -8℃. It should be 3 warmest season here. Autumn comes from 4 to October and it lasts short. 5 comes quickly from November to April next year. Winter is the 6 and coldest season of a year. And the Artic Region is filled with ice and snow everywhere. At this time there is no 7. So it looks like night in winter.

    Are there any people living in such a 8 lace? Yes, they are Eskimos (爱斯基摩人). It is 9 for them to live there, 10 they live happily with a long history.

    There are many ways for us to reduce waste. For 1, we can reuse paper and plastic bags. We can also recycle newspapers, glass, and cans to2 new things. Here are some 3 ways to reduce waste.

Write on 4 sides of paper.

    Many people write on only one side of their paper. Why not stop 5the other side? Some students only use half the pages of their notebooks before getting new ones. Try to use up all the paper. People often give cards on birthdays or festivals. How about trying to 6 e-cards instead?

Don't throw away your old batteries (电池).

    Maybe you do not know that old batteries make the earth dirty. This is 7  they have poisonous parts in them. So, don't throw away batteries. Keep them together. Try to use rechargeable (充电的) batteries for your games and CD players.

    Give off all your unwanted clothes.

    There are many poor families in China. You may ask your mother to 8 your unwanted(多余的) 9. Then you can pass them on to those poor children. You will feel 10that you are helping someone else. Also, you can understand if your friends or relatives (亲戚) want them before throwing them away.