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 _____ home. It is _____ for a bee to tell ______ bees where the food is by speaking to _____, but it can do a little dancing. This tells the bees where the food is and _____ it is.

Some animals show how they feel by making sounds. It is not difficult to ____. If a dog is angry, it barks(吠). Birds make several different sounds and ____ has its own meaning. Sometimes we humans make sounds ____. We make sounds like“Oh!”or“Ouch!”to show how we feel about something or when we _____ 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 ____ give each other information. Writing down words, we can remember what has happened or send messages to people far away.

   Plants are very important. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals can get their food by eating plants and other animals. Man gets his food by eating plants and animals, too. So animals and men need plants in order to live. This is why there are so many plants around us.

There are two kinds of plants: flowering plants and non-flowering plants. Almost all the trees around us are flowering plants. You can know some trees from their flowers and fruit. Non-flowering plants do not grow flowers. You can not see many non-flowering plants around you.

If you look carefully at the plants around you, you will find that there are many kinds of plants. Some plants are large and some are small. Most of them are green. Thanks to the plants around us, we can live on the earth.

   Tom has the most beautiful garden in our town. Many people take part in “The Nicest Garden Competition” each year, and Tom wins every time. Mike’s garden is larger than Tom’s. Mike works harder than Tom and grows more flowers and vegetables, but Tom’s garden is more interesting. He has made clean paths (小径) and built a wooden bridge (桥) over a pool. I like gardens, too, but I do not like hard work. Every year, I take part in the garden competition, too, and I always win a little prize (奖励) for the worst garden in our town.

There are a lot of trees around us. The trees can help to make the air 【小题1】 and cleaner. They can also help to 【小题2】 the weather. They provide(提供) humans with food，【小题3】, medicine and other things. Because of the trees, many animals can live 【小题4】 the earth. But people often cut trees down in large numbers. The forests are becoming much 【小题5】 than before, so we should protect them well.