Everyone  1  that milk is white and that milk is important for children's growth and a healthy  2  for the adults.

    But now many European young people believe that it is not quite helpful to someone if he still  3  white milk, a children's favorite drink. So they  4  white milk at a certain age.

    In Switzerland, 5  , a new kind of milk has been  6  . It is no longer  7  . Will you believe that the “milk”  8  is brown is made from ordinary milk?

    That invention has  9  people's mind about milk. Now in Swiss restaurants people always ask for such a drink because it has no  10  of milk, although it still keeps the nutritious elements(营养成分).

    Many animals use some kind of “language”. They use signals(信号)and the signals have meanings. For example, when a bee(蜜蜂) has found some food, it goes 1 home. It is 2 for a bee to tell 3 bees where the food is by speaking to 4, but it can do a little dancing. This tells the bees where the food is and 5 it is.

    Some animals show how they feel by making sounds. It is not difficult to 6. If a dog is angry, it barks(吠). Birds make several different sounds and 7 has its own meaning. Sometimes we humans make sounds 8. We make sounds like “Oh!” or “Ouch!” to show how we feel about something or when we 9 something on our feet.

    We humans have languages. We have words. These words have the meaning of things, actions(行动), feelings or ideas. We 10 give each other information. Writing down words, we can remember what has happened or send messages to people far away.

    Elephants are the largest living animals on land. More than 500 1 kinds of elephants were found on the earth over the last 55 million years. Only 2 kinds are still alive today: the African elephant and the Asian (or Indian) elephant. These elephants can only be found in 3 places. However, the older kinds lived in cold places a long time4. An example is the mammoth (猛犸象) — the largest hairy elephant.

    The mammoth was the largest living elephant, which was about seven tons. 5 the elephants today, mammoths had black or dark brown hairs 6their bodies. All the mammoths had tusks (长牙).

    Scientists found most of the extinct (灭绝的) animals by 7 the fossils, 8 their bones and teeth that could be found. However, mammoths are quite different. During the Ice Age, mammoths died and were covered 9 in the ice. The ice kept them very well. So scientists could find the 10 body of the mammoth.

    What do you think of robots? Will they work for humans in the future?  Maybe we can't answer it.But robots have 1 an important part in our daily life for several years .But in some science fiction movies, the robots are just like humans. Now they help humans with the housework and do the most 2 jobs.

    Many scientists believe that there will be such robots in the future.3they agree it may 4 hundreds of years. Scientists are now trying to make robots look like people and do the same things as us.

    But robot scientist James White 5 He thinks that it will be 6 for a robot to do the same things as a person7 it's easy for a child to wake up and know where they are. Mr. White thinks that robots won't be able to do this. But other scientists disagree. They think that robots will be able to talk to people 8 25 to 50 years.

    Robot scientists are not just trying to make robots look like people. For example, there are already robots working in factories. They do many 9 over and over again. People would not like to do such jobs and would get bored. But robots will10 get bored.

    In the future, there will be more robots everywhere, and humans will have 11 work to do. New robots will have many different12. Some will look like humans, and13 might look like snakes. After an earthquake , a snake robot could help look for people under buildings. That may not seem possible now, but computers, space rockets and even electric toothbrushes 14 impossible a hundred years ago. With the 15of science technology. We never know what will happen in the future! Let's work much harder to make robots serve us better!

    The solar powered bicycle—"Cycle Sol"(太阳能自行车)

A person riding a bicycle uses little energy to make the bicycle move, and there is no pollution at all when you are1. But in some countries most people don't go to work by bicycle because they wouldn't like to spend more time and feel2.

    These3a solar powered bicycle has been invented in England. Persons who ride it may not feel tired, and it's good4the environment.

    The solar-powered bicycle5an electric bike(电动车) but the motor(发动机) runs on a solar energy battery.

    The bright yellow "Cycle Sol" looks like a normal cycle but has a canopy lined with solar cells overhead (可以接受太阳能的天棚装置).

    The bicycle can be left in the daylight to charge(充电), even when the sky is6. You can leave it outside the office during the day to ride to7. These days solar cells are pretty good at8light, so it should still work when the sky is cloudy. 9night, the small battery can be charged using the main electricity in just a few hours. To save energy, when you're peddling up a steep hill, you can turn off the motor. And if10rains, the cell will keep you dry.

    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.