The movie The Martian (《火星救援》) is very popular among space lovers. It shows an astronaut trying to live on Mars.

    Although the idea of living on Mars is great, the reality does not look so good. Mars does not have a friendly atmosphere (大气层) for humans. There is very little oxygen there. And because it is too far away from the sun, it is also very cold there. Sometimes the temperature on Mars can be -133℃. This is much too cold for humans.

    However, scientists say it might be possible to live there even without a good atmosphere. Daytime on Mars is almost the same as Earth's. It means there's enough sunlight to grow plants inside safe buildings. However, they would have to grow in soil from Earth. Mars does not have a strong enough atmosphere to stop the radiation (福射) coming from space, which makes it dangerous to grow things in the soil.

    The radiation also causes problems for our health. One way to live there is to build homes underground or in the rocks on the planet. This can help humans keep away from the radiation and keep warm.

    When could we live on Mars? Scientists are hoping to make it possible to live on Mars. Let's wait and see.

The computer plays an important part in our everyday life. It is one of the greatest 1 in the world in the2 century. It works for us not only at home, in the offices, in big shops, but also at schools. Today it is used 3 many ways. It really brings the world large wealth (财富) and happiness.

The first computer in the world was4 Enid. It was built in America in 1946. It was5 and heavy. 6 it was born, it has been developing very fast. Until now it has gone 7 four periods(时期)and changed a lot. There are many kinds of computers. Computers are getting smaller and smaller and computing faster and faster. It becomes more and more helpful.

The computer can do most of the things8 people. It can help us know about the real world more quickly, learn9 we want to learn and think for ourselves. 

10 a student in the twenty-first century, you must work hard at it.

Here are some cartoon characters．Let's have a look．

Parents with high expectations for their children are nothing new to Chinese kids. However, people often don't realize that children also have expectations for their parents. China Youth & Children Research Center did a survey in four countries.

The survey found that 83.8% of Chinese children want to be friends with their parents— the greatest amount（数量） among the four countries. {#blank#}1{#/blank#}

Sophia Ren, 13, has her own thoughts about the subject. Ren is an ABC, or American-born Chinese. Although her family lives in California, they cannot avoid the influence of their Chinese background. "I feel like my friends are closer to their parents. {#blank#}2{#/blank#}" Ren said. "In Chinese families, you usually don't do things like that."

According to China Youth Daily, traditional Chinese values are stopping parents from becoming friends with their children. {#blank#}3{#/blank#} As children, what can you do to make home a happy place and make friends with your parents? Here are some tips.

Manage yourselves like an adult.

If you want your parents to give you more freedom, you should show them that you're ready to be treated differently. For example, learn to use self-control. Show them that you can manage your time well.

Open your heart to your parents.

US psychologist（心理学家） Carl E. Pickhardt wrote in Psychology Today that sharing feelings with your parents can lead to positive changes, while not sharing them can cause misunderstandings.

Care for your parents.

{#blank#}4{#/blank#} For example, help them with some home chores, make them gifts or teach them some computer skills. Their trust in you will grow.