—My father is ________ a teacher.

    In most parts of the world, many students help their schools make less pollution. They join "environment clubs". In an environment club, people work together to make our environment clean.

    ●No-garbage lunches. How much do you throw away after lunch? Environment clubs ask students to bring their lunches in bags that can be used again. Every week they will choose the classes that make the least garbage and report them to the whole school!

    ●No-car day. On the no-car day, nobody comes to school by car—not the students or not the teachers! Cars give pollution to the air, so remember:

    Walk, jump, bike or run.

    Use your legs! It's lots of fun!

    ●Turn off the water! Did you know that some toilets can waste twenty to forty liters (升) of water an hour? In a year that would fill a small river! In environment clubs, students mend those broken toilets.

    We love our environment. Let's work together to make it clean.

    Why do plants grow in some places but not in others? Why does some land have so many plants growing on it, while other land has almost (几乎) no plants growing on it at all?

    To grow, plants need several things. One is warmth. In very cold places almost nothing grows. Plants also need water. In very dry parts of the Earth, only a few unusual plants can grow. That's why dry deserts everywhere are almost not covered by trees or grass.

    Plants must also have a place in which to put down their roots and grow. They find it difficult to grow on hard land. The town is built on hard land. The plants here have only the soil found between the cracks of the stones to grow in.

    Another thing plants must have before they can grow is food.

    What will happen if we try to make things grow on the sandy beach? A few plants, such as beach grass, will grow in sand, but most plants won't, Even if (即使) the weather is warm enough and we water the plants each day, many of them will die because the sand on this beach has almost no food for plants.

    A forest is an area of land with many trees. Many animals need forests to live in, Forests are very important and they are common all over the world. People cut down many forests to build houses because the number of people becomes larger and larger. People cut down the forests, which is harmful to the animals. People even build roads to pass through the forests so that they can get to the place they want to get to in a fast way. People damage the forests to build towns, cities, farms, factories and other things.

    Forests usually have an average temperature (平均温度) of 4℃ to 10℃. The low temperature is from-10℃ to-6℃. The high temperature is from 20℃ to 27℃. There is lots of rain in the forests, so many animals live in the pools on the ground. People use trees in the forests to make furniture (家具), toys, pencils, etc.

    We live on Earth. It's (we) home. But how much do you know about ? Let me tell you something about our Earth.

    The Earth is like a huge ball. Like other seven planets, the Earth is (run) around the Sun. It's the third nearest one to the Sun. It (take) the Earth a year to run around the Sun. At the same time, the Earth is going around itself. If you are in space, you can see (lot) of white clouds over the surface of the Earth. Through the clouds, you can see the blue colour of the (ocean), and the brown colour of the land. About 70% of the Earth (be) covered with water.

    Why do we have day and night? When the half the Earth is facing the Sun, it's daytime. As the Earth (turn), and this half is away from the Sun, night is coming. And it's daytime for the other half.

—Yes, I'm from ________.

—Some live on the land. ________ fly in the sky.

    As we know, life today has many problems. One of the biggest is 1, such as water pollution, air pollution, 2 pollution and so on. Water pollution makes our rivers and lakes 3. It kills fish and pollutes our drinking water. Air pollution is the most serious kind of pollution. 4 bad for living things in the world. Noise pollution 5 us talk louder and become angry 6.

    The Earth is 7 home and we must save it. We can't 8 rubbish here and there. We should go to work and school 9 bus or with our friends in the same car. Everybody 10 save the Earth.

—I know, thank you.