题目内容
Rivers are one of our most important natural resources(资源). Many of the world’s great cities are located on rivers, and almost every country has at least one river running through it that plays an important part in the lives of its people.
Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississippi. The lifeline of Egypt is the Nile. To the people of India, the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in southeastern Asia. The greatest of all for navigation（航海）, however, is the Amazon in Brazil（巴西）. It is so wide and so deep that large ships can go about two thousand miles up it.
Besides transportation, rivers give food to eat, water to drink, water for crops, and chances for fun. In order to increase the supply(供给) of water for crops, engineers sometimes build a dam (大坝)across a river and let a lake form behind the dam. Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries.
However, large cities and industries that are located on rivers often cause problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits of these natural resources.
【小题1】The greatest river for navigation is ________________.
| A．the Mississippi | B．the Nile |
| C．the Mekong | D．the Amazon |
| A．Many cities are located on rivers. |
| B．Almost every country has at least one important river. |
| C．The Nile is in India. |
| D．Rivers play an important part in the lives of people. |
| A．keeping the rivers clean |
| B．making electricity |
| C．washing clothes |
| D．irrigation and the production of electricity |
| A．people’s drinking water too much |
| B．people’s swimming in the river too much |
| C．chemicals and other materials |
| D．people’s building a dam across a river |
| A．The Importance of Rivers | B．Rivers in Cities |
| C．Transportation | D．Natural Resources |
【小题1】D
【小题2】C
【小题3】D
【小题4】C
【小题5】A
解析【小题1】根据文章内容The greatest of all for navigation（航海）, however, is the Amazon in Brazil（巴西）可知答案为D
【小题2】根据文章内容可知答案为C
【小题3】根据文章内容Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries.可知答案为D
【小题4】根据文章内容the water in the rivers becomes polluted with chemicals and other materials.卡答案为C
【小题5】根据文章内容大意可知答案为A
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.
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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.
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In the past, man did not have to think about the protection of his environment. There were not many people on earth, and natural resources seemed to be unlimited.
Today, things are different. The world has become too crowded. We are using up our natural resources too quickly, and at the same time we are polluting our environment with dangerous chemicals. If we continue like this, human life on earth will not survive.
Everyone realizes today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow on the land. Yet, we continue to use bigger and more powerful machines to cut down more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this.
We know, too, that if the population of the world continues to rise at the present rate, in a few years, there will not be enough food.
What can we do to solve these problems?
If we eat more vegetables and less meat, we will easily get more food. Land that is used to grow crops can feed five times more people than land where animals are kept.
The world population will not rise so quickly if people use modern methods of birth control.
Finally, if we educate people to think about the problems, we shall have a better and cleaner living place in the future.
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The importance of protecting the environment |
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Problems |
◆ More fish being caught. ◆ More 1. being cut down. ◆ More waste products being put into rivers. ◆ More2. being born. |
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Causes |
◆ The world is becoming too 3. . ◆ Modern methods make the situation worse . |
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Result |
We human beings will not survive on the earth. |
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Solutions |
◆ Eat more vegetables and less meat so that more food will be available for everyone. ◆ Use modern methods of 4. control so that the population will not grow too fast. ◆ Educate people so that the 5. will be better and cleaner. |