World Wildlife Fund (WWF)'s goal is to save the world's environment. The organization was set up ___21__September 11，1961. In the beginning, WWF worked __22__ the world's wildlife. Now, it works to save Earth__23___ its environment.

WWF has many tasks. One is to stop air pollution. Pollution from industry(工业)  and cars is _24_ to our environment. Each year, more and more trees are cut down __25__WWF tries to protect Earth's forests．Also people use more land, more and more animals are __26__ their homes and many die. WWF can buy important areas to __27__ the land from disappearing because of human development.

WWF has completed many projects. In China, WWF works to save pandas from  extinction（灭绝）． ___28__South America，it works to save the Amazon Rainforest.  Volunteers and donations help WWF complete its work. WWF's work is __29__to our environment, and is also important for people to help them __30__ time and money.

When Wang Hai went to Yucai Middle School two years ago, he worked hard and did very well in his lessons．He was also  1  in sports．He ran to school every day to build up his  2  ．His parents were very  3  him and bought him a computer as a birthday present．However，something began to change．He stopped  4  early and never ran to school any more．He  5  his interest in studying．

    One day in the middle of the night, Wang Hai’s mother discovered the cause of the  6  ．He played computer games till midnight．It had a  7  effect(影响)on him and must be stopped．

    The next day Mother had a serious talk with Wang Hai． 8  taking the computer away，she told him he was  9  enough to control himself．Wang Hal was happy he had a wonderful mother and  10  not to do that again．

1．A．worried                  B．unusual         C．active                D．nervous

2．A．body                    B．legs             C．arms                  D．head

3．A．surprised at             B．strict with       C．angry with            D．satisfied with

4．A．getting up             B．putting up      C．getting on              D．putting on

5．A．forgot              B．lost              C．found              D．took

6．A．choice              B．change          C．chant               D．chance

7．A．good               B．bad            C．useful                    D．useless

8．A．Instead of             B．Instead        C．Because of        D．Because

9．A．strong               B．weak          C．old               D．young

10．A．printed                B．protected        C．provided         D．promised

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.

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

2. In most places, __________after trees are cut down.

A. new trees can grow better                  B. forests will become deserts      

C. most animals can live there                 D.people build new house there

3. According to the passage, we should  _________________ to protect the forest.

A. use fewer wood products            B. plant more trees      

C. blame the local people              D. protect the soil

What can we students do _____ the environment?