—One is enough.

—We need some ________ and two ________.

—Yes, I'd like ________.

—It may be a well-known fact, but I don't know it.

—Because it can protect me from the rain.

—Please help me put the milk into the bottle on the table.

—I know, thank you.

—Yes, I want to get high scores too.

                     people know what his real name is.

—Which kind of animal lives longest              ?

—Turtles.

The website        us        much information about travelling to Africa.

       the water        the glass and the salt will be gone.

Don't               that old book.

    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.

    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.

    We all live on Earth and enjoy our life every day, but you may not be aware of all the fun and interesting facts about the Earth.

    The Earth is not round. Do you think the Earth is round? Wrong! Well, it is not completely round.

    The Earth is really old. Grandma and Grandpa are old, but the Earth is much older. Scientists think that the Earth is about 4. 5 to 5 billion (十亿) years old.

    Much of the Earth is water. About 70% of the Earth is water, and only about 30% of the Earth is land.

    Earthquakes happen all the time. Do you know that the Earth has earthquakes all the time? But most of the time, the earthquakes are very small and humans cannot even feel them.

    Mount Qomolangma is the highest mountain. There are many mountains on Earth, but Mount Qomolangma is the highest mountain on Earth.

    There are so many interesting and fun facts about the Earth, Be sure to check out the sources and see how much you can learn about our awesome (令人惊叹的) planet—the Earth!