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.

    We each have a memory. That's why we can still remember things after a long time. Some people have very good memories and they can easily learn many things by heart, but some people can only remember things when they say or do them again and again. Many of the great men of the world have got surprising memories.

    A good memory is a great help in learning languages. Everybody learns his mother language when he is a small child. He hears the sounds, remembers them and then he learns to speak. Some children are living with their parents in foreign countries. They can learn two languages as easily as one because they hear, remember and speak two languages every day. In school it is not so easy to learn a foreign language because the pupils have so little time for it, and they are busy with other subjects, too.

    But your memory will become better and better when you do more and more exercises

    We see many animals，like rabbits，bees，birds，sheep and so on，but do you know1 these animals say things? First，let's see a rabbit. When a rabbit sees something2 it runs away at once. When it runs，its tail moves up and 3. When other rabbits see this，they run 4. Many other animals use this kind of 5. When a bee has found some food，it goes back to its home. It cannot tell 6 bees where the food is by speaking to them，but it does a little dance in the air. They may tell other bees 7 the food is. Some animals say things by making sounds like a man does. 8 ， a dog barks when a stranger comes near. Some birds can make several 9 sounds，each with its own meaning. In a word，every animal has its 10language.

    Do you know anything about the invention of the bar code(条形码)?

    A small food store owner found it was 1 to keep records of the product information. In 1948, he asked the Drexel Institute of Technology to solve this 2. Bernard Silver, a graduate student, was 3. He and his friend Norman Joseph Woodland 4 to work on it. 5, they invented their first working system.

    The system did work 6, but it was very expensive and 7 the system didn't work well. If the invention was to become 8 in stores, the problems had to be solved. Finally, Woodland solved 9.

    The patent (专利权) for the bar code system was 10 for by Silver and Woodland in 1949, but the patent was not given until 1952. 11 this patent was given, the system was still not popular 12 store owners.

    In 1970, a business named Logicon Inc. 13 the Universal Grocery Products Identification Code (通用杂货产品识别码). Marsh Supermarket in Troy was the first store to 14 this bar code reading system. It has become very popular ever since, and now it's 15 in all types of stores all over the world.

    There have been many great inventions that change the way we live. The first great 1was one that is still very important today-the wheel. This made it easy for man 2heavy things and to travel long distances. For hundreds of years after that, there were 3inventions that had as much effect as the wheel. Then in the early 1800's the world started to change 4. There was little unknown land left in the world. People did not have to explore much anymore. In the second half of the 19th century many great inventions were made.      5them were the camera, the electric light and the radio. These have all become a big part of our life today.

    The first part of the 20th century saw more great inventions. The helicopter in 1909. Movies 6sound in 1926. The computer in 1928. And jet planes in 1930. This was also a time when a new 7was first made. Nylon came out in 1935. It changed the kind of clothes people wear. Of course new inventions continued to be made. Man began looking 8 ways to go into space. Russia made the first step. Then the United States took another. Since then other countries，including China and Japan,9their steps into space. In 1969 man took his biggest step away from earth. 10first walked on the moon. This was certainly just a beginning. New inventions will someday allow us to do things we have never yet dreamed of.

    What is your favourite colour? Do you like yellow, orange and red?

    A yellow room makes us feel1and more comfortable than a dark green one; and a red dress brings warmth and gladness to the saddest winter day. Light and bright colours make people not only happier but2more active. It is a fact that factory workers work3, harder and have fewer accidents4their machines are painted orange rather than black or dark gray.

    Remember then that if you feel low, you can always brighten your day or your life with a new shirt or a few colourful things. Remember also that you will know your friends better when you5what colours they like and dislike. And don't forget that anyone can guess a lot about your character when you choose something in different colours.