The advantages and disadvantages of a large population have long been a(n)【C1】______of discussion among economists. It has been

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问题     The advantages and disadvantages of a large population have long been a(n)【C1】______of discussion among economists. It has been argued that the supply of good land is limited. To 【C2】______ a large population, the good land must be worded intensively and the【C3】______ land must be cultivated. Thus, each person 【C4】______less and this means a lower average income【C5】______ could be obtained with a smaller population. Other economists have argued that a large population gives more【C6】______for specialization and the development of facilities. 【C7】______there is a big demand to justify them, facilities such as ports, roads and railways are not【C8】______to be built.
    One of the difficulties in【C9】______a worldwide birth control program lies in the fact that official attitudes to population growth【C10】______from country to country depending on the level of industrial development and the availability of food and【C11】______ materials. In the developing country where a vastly【C12】______population is pressing harder and harder【C13】______the limits of food, space and natural resources, it will be the first concern of government to place a limit on the birth rate,【C14】______the consequences may be.
    In the highly industrialized society the problem may be more【C15】______. A decreasing birth rate may lead to unemployment because it results 【C16】______a declining market for manufactured goods.【C17】______ the pressure of population on housing declines, prices also decline and the building【C18】______ is weakened. Faced with considerations such as these, the government of a(n)【C19】______country may well prefer to see a slowly increasing population,【C20】______ one which is stable or in decline.
【C12】

选项 A、expanded
B、extended
C、broadened
D、magnified

答案A

解析 动词辨析题。由上下文可知,空格中的单词应该含有“增加,增长”的意思。[A]expanded指的是“膨胀,扩张”,也可以表示“增加”,因此为正确答案。[B]extended“延伸,延长”,一般用来形容长度或时间,所以可以排除;[C]broadened指的是“变宽,扩大”,或者是视野的“开阔”,用于此处不合适,故排除;[D]magnified指“放大,夸大”,与文意不符,故排除。
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