People usually check whether their keys, purses and phones are with them before going out, but many people in China now have one more important thing to take--a mask(口罩). They hope it can protect them 1 terrible air.

    Many cities in China saw a lot of foggy days in April. In Beijing, there were eight days in April full of smog. It is dirty air 2 looks like a mixture of fog and smoke. The smoke is mainly from cars and factories in cities. Poor air is bad for people's health, 3 for children and old people. They fell ill easily and the 4 were full of people. They had problems with their noses and lungs.

    So it's necessary 5 people from doing so many bad things to the environment. For example, people should use cars less and   6 burn lots of coal and gas. Government needs to take measures to make factories stop pouring 7 waste air into the sky.

    Three students from No. 4 High School in Beijing 8 a report to advise how to protect the environment. They suggested  9people should plant more trees and act off fewer fireworks for celebration. We hope more people will join us in 10 a difference. In this way, the blue sky will certainly return for good.

    Is human blood all the same? "Sure," you may say. "It's all red." Well, it's not as simple as you might know. Blood is made up of different pans, such as red blood cells, white blood cells, and platelets (血小板). Two chemical molecules (分子) on the red blood cells make people's blood different. Scientists mark one molecule "A" and the other molecule "B".

    According to which and how many molecules are on the red blood cell, scientists divide blood into four types: A, B, AB and O. Your blood type will stay the same through your whole life. Scientists have been wondering if there are some links between people's blood type and their personalities (个性), but they don't know for sure. Some say that people with the same blood type may have things in common.

    What's your blood type? Does your friend have the same blood type as you? Read the following.

    People with type A: They look peaceful from the outside. But they ask so much of themselves that they may be very agitated inside. They become happy or sad easily. Sometimes they are shy but always very careful. They can easily win people's trust.

    People with type B: They have strong minds. Once they begin a task and make up their minds to do it, they will not give up easily. They'll try their best to finish it and do it well. They always try to make themselves different from others. They want to do things in their own way.

    People with type AB: Maybe they are the strangest among all blood types. They can be both open and shy, noisy and quiet at the same time! They are responsible and always ready to help others.

    People with type O: They're open and good at making friends. They always begin tasks but don't always finish them in the end. They have lots of new ideas and love to be the centre of attention. They always strongly believe in themselves.

    In America, the school life is not easy for us students. There are so many rules we have to follow. When we start school, we get a rule book. There are always teachers looking out for people who are breaking the rules and prefects (长官) are everywhere too.

    The most rules are in the classroom and in the hallways. For example, you can't run or dance around in the hallways. We can't put our bags everywhere in the hallways.

    You can't eat or drink in the classroom or the hallways. Prefects watch you, They can give out duty slips (cleaning the dining hall for about 2 hours).

    If you make mistakes, you will get a detention. You may have to do some work for school. A detention is the most painful. You have to do a lot of tiring and boring things. There are rules for students out of school as well. Boys should not buy take away food in the street if they wear the school uniforms. The school also expects good behavior on public transport and in public places.

Every year on 24 April, it's Space Day of China.  It's a day to celebrate the country's growth in space exploration.  The manned space missions (载人航天任务) are a big part of it.  {#blank#}1{#/blank#}

What problems do astronauts face?

In space, astronauts face many problems.  There is little gravity (重力) there, which affects their bodies. {#blank#}2{#/blank#} What's more, if something goes wrong during their mission all of a sudden, they have to work out how to fix it under huge pressure.  That's why astronauts have to be smart, strong, and ready for any challenge before they can go to space. 

{#blank#}3{#/blank#}

"To make sure that Chinese astronauts complete their missions and return to the Earth safely, over 200 kinds of training are set," said Huang Weifen, the chief designer of the project.  These include not only physical training but also some basic science training.  So before astronauts can go to space, they train like this for at least three and a half years. 

{#blank#}4{#/blank#} This helps them get ready for the weightless environment in space.  Huang explained that astronauts wear diving suits (潜水服) that weigh more than 100 kilograms and stay underwater for six hours at a time.  She said that it was quite hard.  For example, Nie Haisheng even lost 2 kilograms after one underwater training exercise. 

A. How are astronauts trained?

B. What is the weightless feeling?

C. Being an astronaut is cool but difficult. 

D. Also, being in a tiny spaceship can make them feel stressed out. 

E. One of the hardest parts of the training is the underwater training.