题目内容
B. looking
C. look
D. looked
It is said that another acre of the world’s forest will be destroyed forever. Why is this happening? There are two reasons — land and wood. In many countries the trees have been cut down because the land was needed for animals or crops. In other parts of the world the trees are cut down because their wood is wanted. This wood is used by local people for firewood or it is used for building. But many people don’t know that in most places the trees won’t be replaced. The soil in the forests is very thin, but it is protected by the trees. When the trees are cut down, the soil is washed away by the rain or blown away by the wind. Soon nothing can be grown on it. The forest becomes a desert. Then more land will be needed, and more trees will be cut down.
When the forest is destroyed, it isn’t only the trees that are lost — the homes of millions of animals and plants are destroyed, too. All kinds of animals are in danger — fish,reptiles, birds, mammals, insects, and shellfish — as well as thousands of plants.
Who is to blame for this? The answer is simple: all of us. There are just too many people in the world. The world’s population is now six billion. Of course, it’s very easy to blame the local people. We don’t cut down trees. They do. But the products are bought by people like you and me — wood houses, beds, tables, chairs, paper… Why are the forests being destroyed? Just look around. You are probably using it right now.
【小题1】People cut down large areas of trees in order to _________.
| A.grow crops | B.keep animals | C.build houses | D.get land and wood |
| A.new trees can grow better | B.forests will become deserts |
| C.most animals can live there | D.people build new house there |
| A.use fewer wood products | B.plant more trees |
| C.blame the local people | D.protect the soil |
Deserts(沙漠)do not stay the same size (形状).Sometimes they grow bigger. Sometimes they get smaller. The world’s biggest desert, Sahara, is in Africa. Right now, the Sahara desert is growing fast.
Why is the Sahara growing ? In some places , People farm too much. In other places ,animals eat all the grass. or people cut down the trees. This makes the soil(土壤) weak. Weak soil lets the desert grow.
Why is it a problem? people can not grow food in the desert. people can not build houses, hospitals , or schools in the desert . so people must leave their homes .They must live somewhere else.
What can people do ? They can plant trees. They can also farm less. These things make soil stronger. maybe the Sahara will stop growing . It’s a big problem. Many people must work together to solve (解决) it?
【小题1】What is the main idea ?(中心思想)
| A.The Sahara Desert is in Africa . |
| B.Farming too much makes the soil weak. |
| C.Big problem are caused (引起) by the growing Sahara desert. |
| D.Planting trees will help the world. |
| A.Building homes | B.Farming too much |
| C.Animals eating the grass | D.Cutting down trees |
| A.Their size never changes | B.They are caused by people |
| C.They can make trouble for people | D.They are all in Africa. |
| A.make the soil weaker | B.help people farm less |
| C.be good for the soil | D.make the Sahara grow. |
| A.is easy | B.takes a lot of people |
| C.is not a big problem | D.is not important |
Deserts(沙漠)do not stay the same size (形状).Sometimes they grow bigger. Sometimes they get smaller. The world’s biggest desert, Sahara, is in Africa. Right now, the Sahara desert is growing fast.
Why is the Sahara growing ? In some places , People farm too much. In other places ,animals eat all the grass. or people cut down the trees. This makes the soil(土壤) weak. Weak soil lets the desert grow.
Why is it a problem? people can not grow food in the desert. people can not build houses, hospitals , or schools in the desert . so people must leave their homes .They must live somewhere else.
What can people do ? They can plant trees. They can also farm less. These things make soil stronger. maybe the Sahara will stop growing . It’s a big problem. Many people must work together to solve (解决) it?
1.What is the main idea ?(中心思想)
|
A.The Sahara Desert is in Africa . |
|
B.Farming too much makes the soil weak. |
|
C.Big problem are caused (引起) by the growing Sahara desert. |
|
D.Planting trees will help the world. |
2.The Sahara is growing .Which of these things is not a reason(理由)?
|
A.Building homes |
B.Farming too much |
|
C.Animals eating the grass |
D.Cutting down trees |
3.What do we know about deserts ?
|
A.Their size never changes |
B.They are caused by people |
|
C.They can make trouble for people |
D.They are all in Africa. |
4.Planting trees can
|
A.make the soil weaker |
B.help people farm less |
|
C.be good for the soil |
D.make the Sahara grow. |
5.Stopping growing the desert
|
A.is easy |
B.takes a lot of people |
|
C.is not a big problem |
D.is not important |