Population Problem More and more of the world’ s population are living in towns or cities. The speed at which cities are gro

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问题                         Population Problem
    More and more of the world’ s population are living in towns or cities. The speed at which cities are growing in the less developed countries is【C1】______(alarm). Between 1920 and 1960, big cities in【C2】______(develop)countries increased two and a half times in size, but in other parts of the world the【C3】______(grow)was eight times their size.
    The sheer size of growth is bad enough, but there are now also very【C4】______(disturb)signs of trouble in the comparison of percentages of people living in towns and percentages of people working in industry. In Europe, the proportion of people living in cities was always smaller than that of the work force working in factories. Now, however, the reverse is almost always true in the newly【C5】______(industry)world.
    Without a base of people working in industry, these cities cannot pay for their growth. There is not enough money to build adequate houses for the people that live there, let alone the new【C6】______(arrive). There has been little opportunity to build water supplies or other facilities. So the figures for the growth of towns and cities represent【C7】______(proportion)growth of【C8】______(employ), a growth in the number of【C9】______(hope)and【C10】______(despair)parents and starving children.  
【C7】

选项

答案proportional

解析 本句空白处放在名词growth前面,另根据本句句法结构提示需填入形容词来修饰growth。因此,把提示词名词proportion改成形容词proportional(成比例的;均衡的)即可。
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