Scientists （科学家） are trying to make the deserts （沙漠） into good land again. They want to bring water to the deserts, so people can live and grow food. They are learning a lot about the deserts. But more and more of the earth is becoming deserts all the time. Scientists may not be able to change the deserts. Scientists think that people make deserts. People are doing bad things to the earth.

Some places on the earth don’t get much rain. But they still don’t become deserts. This is because some green plants are growing there. Small green plants and grass are very helpful to dry (干旱的)places. Plants don’t let the hot sun make the earth even drier. Plants don’t let the wind blow the earth away. When a little bit of rain falls, the plants hold the water. Without plants, the land can become deserts much more easily.

1.Why can the land become deserts?

A. Some places don’t get much rain.

B. Plants don’t let the hot sun make the earth even drier.

C. People don’t keep the earth well.

D. Scientists haven’t learnt enough about the deserts.

2.Scientists are???????? to make the deserts into good land again.

A. carrying water? B. growing food? C. doing nothing????????????? D. studying a lot

3.Which is NOT true?

A. The land never stops becoming deserts.

B. Scientists ask people to live in the deserts and grow food there.

C. People do bad things to the earth.

D. Scientists may not be able to change the deserts.

4.Why are green plants and grass helpful?

A. They can hold the water.?

B. They can keep the earth wet.

C. They can stop the wind from blowing the earth away.

D. All the above.

5.Which is the best title（题目）for the passage?

A. The Desert Problem?????????

B. People Make Deserts

C. Green Plants and Grass???????

D. The Deserts, the Tree and the Water

Please help!

Ladies and gentlemen, thank you very much for coming to this concert. I hope you have enjoyed the music.

The purpose of this concert is to (1) money for children in Africa. Every day (2) children in Africa die because they have diseases or have not enough (3) . There are two main reasons. First, there are no jobs for the children's parents, so they have no money to buy food or (4) . Second, the governments in many African countries do not have the money to take care of poor people.

Most African countries are poor. The land is not good for (5) food and the weather is also bad for farming. The organization we are trying to help, the Feed Africa Fund, _(6) a lot of money every year on food for poor people in Africa. The money comes (7) people like you kind, generous people who do not want to see children die form hunger. Just one dollar can buy enough rice or corn to (8) a family of four for three days.

How much do you spend on food every day? Ten dollars? Twenty dollars? I am sure you can spend a little (9) on your own food so that you have a few dollars for The Feed Africa Fund.

Ladies and gentlemen, we will now take a (10) . Please be generous. Thank you.

In 1620, about half the USA was covered by forests. Today the forests have almost gone. A lot of good land has gone with them, leaving only sand. China doesn’t want to copy the USA’s example. We’re planting more and more trees. We’ve built the " Great Green Wall" of trees across northern part of our country. The Great Green Wall is 7,000 kilometres long, and between 400 and 1,700 kilometres wide. It will stop the wind from blowing the earth away. It will stop the sand from moving towards the rich farmland in the south. More "Great Green Walls" are needed. Trees must be grown all over the world. Great Green Walls will make the world better.
根据短文内容，选择正确答案。
【小题1】The Great Green Wall in China is ______.

The world is divided into two parts. One half of the world is rich and   26  is poor. In the poor part, a lot of people have  27 got enough to eat. When they are ill, none of the   28 can receive them because they have no money. In the rich   29 , people eat very well,   30 a dog or a cat in North America eats   31 than a child in poorer countries.
The poor countries have some difficult problems. Sometimes the land is too poor to grow  32 on. People there have   33 rich land nor enough water. The land   34 be made better, but a lot of things must be done. The people must be taught and water must   35 .
But rich countries have problems, too. There are not always good places to   36 . Sometimes the air is not clean and the rivers are too   37 to swim in or to drink. The roads and streets are full of people and cars. Cars and buses have to move   38 . Noise is too much. Some people have no houses to live in. Something must be done about these problems. The air and the rivers must be cleaned and be   39 clean. More houses have to be built.   40 these things cannot be done easily.