Man cut down ______ forests in order to grow crops, or to use ______ wood as fuel（）

If we keep cutting down the forests, ______ .

A．we will have enough land to grow crops

B．the climate of the world will change greatly

C．it won't rain at all

In order to repair barns, build fences, and grow crops a farmer should be__________.

A．bizarre

B．fantastic

C．versatile

D．reckless

over forests for thousands of kilometers. These great forests are the oceans of trees. There are thousands and thousands of different kinds of plants and animals. However, the world's forests are getting smaller all the time. We are cutting down the trees because we need wood, and we need more farmland. Some people say that there will not be any forests like these in 20 or 30 years. What will happen if they disappear？ If we cut down our forests, a lot of plants and animals will disappear from the world. In a lot of places the new farmland will soon look like the old deserts. Crops will not grow there. It will not rain very often, and the weather will get very hot. Perhaps the climate of the world will change. This will be dangerous for everyone in the world. That is why we must take care of our forests. (以下为试题题干)The need for more wood and more land help to protect our forests.()

ucts; They give him shade and they help to prevent drought (干旱) and floods. Unfortunately, in many parts of the world, in his eagerness to draw quick benefit from the tree, man has cut down a large number of trees. Even where a government realizes the importance of plentiful supply of trees, it is difficult for it to persuade the villagers to see this. So unless the government has a great system of control, or can educate the people, the forests slowly disappear.

The resaults are more serious: for where there are trees their roots break the soil allowing the rain to sink and also hold the soil, thus preventing it from being washed away easily, but where there are no trees, the soil becomes hard and poor.

The rain falls on hard ground and flows away on the surface, causing floods, and carry away with it the rich top soil in which crops grow so well. When all the top soil is gone, nothing remains but worthless desert.

The purpose that the writer wrote this article for is ______.

A．to tell people that trees are very useful to man

B．to warn people not to cut down trees any more

C．to warn that man mustn't destroy forests any more

D．to explain how trees help to prevent drought and floods

听力原文： Human beings are cutting down the world's rain forests at the rate of 20 hectares a minute (31) . Every year, 30 million hectares of rain forests are destroyed. And at this rate, most of the world's rain forests will disappear very soon.

The forests are cut down sometimes for wood, sometimes for farms so that crops and vegetables can be planted and sometimes to make way for roads. But the forests do not re-grow. The soil is very thin and it is soon washed away by the rain. The land is then too poor for the forests to begin to grow again.

There are a number of good reasons for saving the rainforests. Several important drugs in hospitals have come from the rain forests. Also they produce food. The rain forests are rich in wildlife, too. They cover less than 10% of the world's land, but they contain 40%～50%of the world's species of plants and animals (29) . The trees supply oxygen. If the rain forests are destroyed, this will change the world's weather (30) . Temperatures will go up, sea levels will rise and there will be changes in rain and snowfall.

Today, research studies in forests in Panama, New Guinea and Indonesia may help us to find solutions to save the world's rain forests.

(30)

A．15%.

B．10%.

C．About 50%.

D．Nearly 30%.

The writer thinks that ______ .

A．it's dangerous for people to cut down the forests

B．it's important for everyone to keep animals

C．it's necessary for everyone to protect the forests

eed be ______.

A．restless

B．skilled

C．strong

D．versatile

eed be______.

A．restless

B．skilled

C．strong

D．versatile

eed be ______ .

A．restless

B．skilled

C．strong

D．versatile