There are many ways for us to reduce(减少) waste. For 1, we can reduce paper and plastic bags. We can also recycle newspapers, glass, and cans(易拉罐) to make new things. Here are some useful ways to 2 waste.
     Write on 3 sides of paper
     Many people write on only one side of their paper. Why not stop wasting the other side? Some students only use half the pages of their 4 before getting new ones. Try to use up all the paper. People often give cards on birthdays or festivals. How about trying to 5 e-cards instead?
     Don't throw away your old batteries.
     Maybe you do not know that old batteries make the earth 6. This is because they have poisonous parts in them. So, don't throw away batteries. 7 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 clothes. Then you can pass them on to those poor children. You will feel 9 that you are helping someone else. Also, you can understand 10 your friends or relatives(亲戚) want them before throwing them away.

    Protecting (保护) wild animals is our duty. Because wild animals are important to us. They live with us on the earth together. If there are no animals on the earth, we will not live on, 1. So we should 2 them to help us live a healthy life.

    3 some people still don't realize the importance(重要性) of protecting wild animals. They often 4 wild animals for food or for money. Every day there are many wild animals being killed. So lots of wild animals are 5. We can't see them anymore. Today the number of wild animals 6 becoming smaller and smaller. If we don't protect them, they will all die out. If this goes on, there will be no animals  7 on the earth.

    8, more and more people began to do many things to help protect wild animals. They ask people 9 wild animals. They get people to know that protecting wild animals is one of the most important things. Now many 10  have made some laws to protect wild animals. Now that (既然) wild animals are so important to man, we should do our best to protect them.            

    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 do 2differently.

    On Earth, we put food on a plate and water in a glass. Gravity（重力）holds the food down and keep 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 drink 4.

    Sleeping is very different in space. Some astronauts like to float in the air, but most like to be in a 5bag. They tie（捆绑） the bag to a wall 6they 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, 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 10in the air.

    Can you imagine what life will be like in the future? Will life in the future be better, worse or the same as now?1do you think of the future?

    People2that life will be probably very different in 2050. First of all, planes will be very3so flying will be very cheap. Everyone will have a small car. Fuel will be new and clean, but expensive. We will4robots everywhere. And space planes will take us around the universe5two hours. Homes will be warm in winter and cool in summer, so they will be very comfortable. We will use the sun6our homes. Computers will be very small so they will be very7. People will do many things on the Internet.

    At that time, water will become one of our most8problems. In many places, farmers will be in great need of water to9fruit and vegetables.

    By 2050, we will be able to help blind and deaf people see again and10again. At that time, our life will become better and better.

    At the beginning of this century, medical scientists made a interesting discovery(发现). We are bulk not just of flesh (肉)and blood but also of time. They were1to show that we all have a body clock inside us, which controls the2and fall of our body energies. It can 3us different from one day to the next.

    The idea of a body clock should not be too4because the lives of most living things are controlled by the 24-hour-night-and-day cycle. We feel 5 and fall asleep at night and become 6 and energetic during the day. Most people will have a bad feeling 24-hour cycle is 7. For example, people who are not used to working at night can find that luck  (缺少)of sleep causes them to 8 badly at work.

    Besides (除了) the daily cycle of sleeping and waking, we 9 have other cycle which lasts longer than one day. Most of us would 10 that we feel good on some days and not so good on others. Sometimes our ideas seem to be so active, and at other times they are not.