大学英语四级
单选题The author says that in some hot and dry areas it is advisable to _____.A build big lakes to store waterB construct big pumping stationsC channel water from nearby rivers to croplandD build small and cheap irrigation systems
题目
build big lakes to store water
construct big pumping stations
channel water from nearby rivers to cropland
build small and cheap irrigation systems
相似问题和答案
第1题：
The author mentions big cities such as Tokyo, Singapore and Paris______.
A. to show that city people all over the world have a lot in common
B. to let his readers be aware that they are some of the world's biggest cities
C. to illustrate their difference from American cities
D. because they are some of the cities that attract visitors most
44．答案为A 从第三段第一句可知国际上的大城市有很多共同之处。A正确。
第2题：
A.a big city...the countryside
B.a small town...a small village
C.a big city...a small village
D.the countryside...a big city
第3题：
A. a, has
B. /, has
C. a, have
D. a, had
第4题：
Today, people all over the world are moving out of small villages in the country to go and live in big, noisy cities. They are moving from the peaceful hills, mountains, fields, rivers and streams of the countryside to the busy world of streets, buildings, traffic and crowds. This movement from rural areas to urban areas has been going on for over two hundred years.
In many countries, the main reason why people come to live in towns and cities is work. After one or two large factories have been built in or near a town, people come to find work, and soon an industrial area begins to grow. There is usually a residential area nearby, where the factory workers can live. The families of these workers need schools, hospitals and shops, so more people come to live in the area to provide these services and a city grows.
In every major city in the world, there is a business district where the big companies have their main offices. In the United States, this area is usually in the city centre. It is here that you can see the huge skyscraper office blocks. The people who work here often travel a long way to work each day. Many of them live in the suburbs of the city, far away from the industrial area and the city centre. Some suburbs are very pleasant, with nice houses and big gardens. There are usually parks for children to play in and large department stores where you can buy all you need.
But what is the future of the big cities? Will they continue to get bigger? Perhaps not. Some major cities have actually become smaller in the last ten years, and it is quite possible that one day we will see people moving out of the major cities and back into smaller towns and villages.
We can easily know that the underlined phrase "urban areas" in the first paragraph means_____________.
B.areas of a town or city
C.areas near the countryside
D.areas near a town or city
第5题：
A、shopping/ big shop
B、shopping/big shoppings
C、shoppings/big shops
D、shopping/big shops
第6题：
Passage Five
From the beginning rivers have played an important part in the life of man. Man of the earliest times used the rivers as a means of traveling. Today rivers still serve as a great waterway for the transport and people.
In ancient times, man settled near rivers or on river banks and built up large empires.
Water is the Nature's most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations all over the world rivers mean life and wealth. They feed and clothe the nations around them.
Water is also a source of energy and power. Man constructs huge dams across the river to control the water for irrigation and get the energy needed to drive generators. The electrical power is then directed to homes, cities, factories and television stations.
Man uses water each day. His main source of water comes from reservoirs, which in turn get their water from the rivers.
Rivers also bring down soil and minerals from the mountains and deposit them on the plains building up rich river deltas for raising plants and crops. Fresh water life in rivers or in lakes fed by them provide man with food.
In a small way rivers help to keep man in good health and provide for his amusements. Various forms of water sports keep man strong and healthy.
Rivers have run on this earth long before man. Man's future ability to live is uncertain, but rivers will flow on forever.
52. Rivers have been important to man______.
A. since the last century
B. for a very long time
C. since a few hundred years ago
D. since a few years ago
52．答案为B 此题为细节题。从本文第十句可以知道河流从一开始就在人类生活中扮演着重要角色，所以河流对人类重要的时间应当选B(很久了)。
第7题：
I'd like to have some big apples instead of small().
A. ones
B. one
C. it
第8题：
E
The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage（短缺）seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.
Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.
This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation（灌溉）. In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.
Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.
72. From the first two paragraphs we learnt that _______.
A.much of the world’s water is available for use
B.people in high rainfll countries feel lucky
C.the costs of water redistribution should be considered
D.water can be easily carried through pipes across the world
第9题：
第三篇
Preserve the Environment
Throughout history man has changed his physical environment in order to improve his way of life.
With the tools of technology he has altered many physical features of the earth.He has transformed
woodlands into farmland,and made lakes and reservoirs out of rivers for irrigation purposes or hydroelectric
power. Man has also modified the face of the earth by draining marshes and cutting through mountains to
build roads and railways.
However,man's changes to the physical environment have not always had beneficial results.Today,
pollution of the air and water is an increasing danger to the health of the planet.Each day thousands of tons
of gases come out of the exhausts of motor vehicles;smoke from factories pollutes the air of industrialized areas
and the surrounding areas of countryside.The air in cities is becoming increasingly unhealthy.
The pollution of water is equally harmful.In the sea,pollution from oil is increasing and is killing enor-
mous numbers of algae（水藻）,fish and birds.The whole ecological balance of the sea is being changed.
The same problem exists in rivers.Industrial wastes have already made many rivers lifeless.
Conservationists believe that it is now necessary for man to limit the growth of technology in order to sur-
vive on earth.
A:thousands of tons of gases coming out of the exhausts of motor vehicles
B:the changes of the environment that technology has brought to man
C:the increasing amount of oil that has been produced
D:industrial wastes discharged into rivers
文章第二段提出人类使用技术工具改变了地球的自然面貌，为自己带来了便利。第三段说然而人类改变自然环境带来的不只是有利的一面。空气和水的污染已经威协到了植物的 健康生长。由此得知，空气和水的污染是由技术带给人类的环境的变化造成的。
由文章倒数第二段可知，随着石油开发对大海污染的加剧，大量的水藻．鱼类和鸟类被 杀死，由此造成海洋生态平衡的改变。故选C。
该题干问：最可能与环境保护者意见不一致的是？关于环境保护者的意见出现在文章 最后一段，"Conservationists believe that it is now necessary for man to limit the growth of technology in order to survive on earth"，可知环境保护者认为现在应该限制技术的发展速度以保证人类在 地球上生存下去。在四个选项中，A项Industrialists（工业家）与技术发展联系的最紧密，因此 最可能会不同意环境保护者的意见。C项Businessmen（商人）包括的范围很广，并不是所有的 商业活动都与技术发展有关。故选A。
从全文看，这篇文章的目的是：D项号召人们注意保护自然环境。第5部分：补全短文
第10题：
Today, people all over the world are moving out of small villages in the country to go and live in big, noisy cities. They are moving from the peaceful hills, mountains, fields, rivers and streams of the countryside to the busy world of streets, buildings, traffic and crowds. This movement from rural areas to urban areas has been going on for over two hundred years.
In many countries, the main reason why people come to live in towns and cities is work. After one or two large factories have been built in or near a town, people come to find work, and soon an industrial area begins to grow. There is usually a residential area nearby, where the factory workers can live. The families of these workers need schools, hospitals and shops, so more people come to live in the area to provide these services and a city grows.
In every major city in the world, there is a business district where the big companies have their main offices. In the United States, this area is usually in the city centre. It is here that you can see the huge skyscraper office blocks. The people who work here often travel a long way to work each day. Many of them live in the suburbs of the city, far away from the industrial area and the city centre. Some suburbs are very pleasant, with nice houses and big gardens. There are usually parks for children to play in and large department stores where you can buy all you need.
But what is the future of the big cities? Will they continue to get bigger? Perhaps not. Some major cities have actually become smaller in the last ten years, and it is quite possible that one day we will see people moving out of the major cities and back into smaller towns and villages.
In a residential area, you can see ____________.
B.many offices and factories
C.a lot of factories and farms
D.many houses with offices and factories