The Earth is a beautiful place. There are forests and rivers, mountains and fields. We live _____ the Earth. It's our home. But how much do you know about it? Let me tell you _____ about our Earth.

The Earth is like _____ big ball. Like the other seven planets(行星),the Earth is running around the Sun. It's the third nearest planet to the Sun. It takes the Earth about 365 days _____ around the Sun. At the same time, the Earth is going around itself. If you are in space, you can see lots of white clouds over the surface(表面) of the Earth. Through the clouds, you can see the blue colour of the seas _____ the brown colour of the land. About 70% of the Earth is covered______ water.

The Earth used to be very______ and beautiful. But today there______ too much pollution. People cut down trees and kill animals. _____ put rubbish into rivers and seas. So, more and more water is becoming dirty. We must stop ______ these thing.

   Do you know Guangzhou? In Guangzhou, there are many ______ going around the city, and it costs(花费) people only 1 or 2 yuan to take a bus. So many people like ______ a bus to school or to work. But when an old man gets on the bus, do you often ______ your seat to him?

Some people on the bus don't like to help the old people. They just close their ______, listening to music without looking at the old people. Some turn their faces to look out of the ______. When the bus driver keeps asking them to help the old people, they don't ______ him.

However, we should ______ each other, because we may need others’ help one day. Next time, please try to help others on the bus. You can let the ______ people get on the bus before you. You can give your seat to an old man. And you can also give your seat to a ______ with a baby. Then all the people will have a ______ life.

   Nick is a 14-year-old boy. He has a lot of exams and homework on weekdays. He has little free time. He thinks playing computer games is the best way to make him relax(放松). When he has free time. he sits in front of the computer. Just like that day, he doesn't eat or drink for a few hours.

Last weekend, he played games on the computer again. He was too excited and didn't want to move(行动). He didn’t eat anything for six hours. When he had to go to the bathroom, he found he could not move. His parents took him to the hospital. The doctor told him he should do different kinds of activities. In other words, he needs more exercise and outdoor activities to make him have a healthy body.

After coming back from the hospital, Nick follows the doctor's advice(建议). He often plays football with his friends. Sometimes he still plays computer games on weekends, but he never does it for long. Now, he lives a happy and healthy life.

   The Earth is about 4, 600 million years old. People live on the Earth for only 35, 000 years. But we change the Earth in many ways. Many things we do are good, but some are not good for the Earth.

Water pollution

A lot of people, birds and fish die each day because of water pollution. Factories pollute the water. As a result, the water in many rivers and lakes is very dirty now.

Air pollution

In big cities. factories, cars and buses are the main causes(原因) of air pollution. Many people in cities now have health problems. For example, Mexico used to be a beautiful city and was a good place for people to live, but today there is lots of PM2. 5 in the air. And many people get ill because of the polluted air.

Soil(土壤) pollution

In order to have a better harvest(收获), some farmers use chemicals(化学物质) in their fields. That's bad for the soil.

Hope for the future

These problems are very bad for our future, so all of us should do something to protect the environment. If we can stop pollution, the Earth will become more and more beautiful.

   The Earth is very important to us. Most of us don' t want to pollute it. But we don't protect the Earth in some correct ways. Here are some easy things that you can do to protect the environment(环境)and the Earth.

Plant flowers, grass or trees. The plants can make the environment around you become beautiful. Also, more trees and plants can make the air clean.

When you visit a park or beach, take away what you bring there ---- keep rubbish in a bag until you can throw it into a dustbin(垃圾桶).

Turn off the tap when you brush your teeth. You can save some water by not letting it run all the time. Also, use a glass cup instead of (代替)a paper cup because this can protect forests.

Stop putting dirty water into the rivers or lakes. In this way, you can protect plants and fish in the rivers or lakes.

Ask all your friends to do the same things to help protect the Earth. You don't have to wait for Earth Day to do these things. Make every day Earth Day.

If everyone does something good to protect the Earth, it will become more beautiful.

   I'm Lily. I'm from Canada. I'm 14 years old. I speak English. But I like Chinese very much. So I hope I can have a Chinese pen pal. I like sports. I often play basketball with my classmates after school. My favourite player is Yao Ming. I hope my pen friend also likes sports.

Hello, everyone. I'm Mark. Nice to meet all of you. I’m from Fujian, China. I came here with my parents yesterday because they need to work in New York. I hope I can get on well with you.

My name is Judie. I am an Australian girl. I'm studying in No 4 Middle School of Beijing. I am here for three years. My English is very good. I can speak a little Chinese. I think I can be a good volunteer(志愿者).

Do you know me? My name's Jiang Fan. I’m from Class Six, Grade Seven of Shanghai Middle School. Today I'm very glad to stand here for the English speech contest (演讲比赛). I'd like to talk about our duty((责任) to keep the school clean.

   We all know the Sun is important. 【小题1】 But how does the Sun do that? It's the Sun's energy that makes life live on our planet. Energy from the Sun is called solar energy.【小题2】People started to use solar energy many years ago. They build houses with windows so that the sunlight can get inside and make them warm.

【小题3】 It has something to do with solar panels(太阳能电池板). Solar panels collect energy from sunlight to make electricity(电).

But what happens when it is cloudy or rainy? Solar panels cannot collect energy from sunlight on cloudy and rainy days. We needn't worry about it because solar panels have batteries (电池) in them to keep electricity. 【小题4】

The Sun makes more energy than people use now. At the same time, solar energy is good for the environment(环境).【小题5】And we can’t use it up. So we should try our best to find more good ways to use it in our life.

The environment in my city is becoming worse. …