The need to feed a growing population is putting much pressure on the world's supply of wa

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 rainfall 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 seasons, the costs of water redistribution(重新分配)are very high. Not only 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 may 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 for countries with agricultural industries in areas dependent on irrigation (灌溉). In Texas, farmers' overuse of irrigation water has resulted in a 25% reduction of the water stores. In the Central Valley area of southwestern USA, a huge water engineering project provided water for farming in dry valleys, but much of the water use has been poorly managed.
Saudi Arabia's attempts to grow wheat in desert areas have seen 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.
【小题1】What is most likely to be discussed in the paragraph that follows?A．Ways to reduce the costs of building dams.B．Steps to improving water use management.C．Measures to deal with worldwide water shortages.D．Approaches to handling the pressure on water supply.【小题2】From the first two paragraphs we learn that .A．much of the world's water is available for useB．people in high rainfall countries feel luckyC．the costs of water redistribution should be consideredD．water can be easily carried through pipes across the world【小题3】The text is mainly about .A．water supply and increasing populationB．water shortages and environmental protectionC．water redistribution and wildlife protectionD．water use management and agricultureB

(答案→)B 解析：文章主要讲述了水资源的管理和农业的问题。【小题1】B 推理题。文章谈论了水资源管理方面存在的严重问题，那么接下来应该是讨论解决问题的具体方法。【小题2】C 推理题。根据文章前两段可知全世界存在着严重的水短缺的问题，那么降雨丰沛的国家应该是副词的幸运。故C正确。【小题3】D 主旨大意题。文章主要讲述了水资源的管理和农业的问题，故D正确。

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