More and more of the world’s population are living in towns or cities. The speed at which cities are growing in the less develop

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问题     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【B1】______. Between 1920 and 1960 big cities in developed countries increased two and a half times in size, but in other parts of the world the growth was eight times their size.
    The【B2】______size of growth is bad enough, but there are now also very disturbing signs of trouble in the【B3】______ of percentages of people living in towns and percentages of people working in industry. During the nineteenth century cities grew【B4】______ the growth of industry. In Europe the proportion of people living in cities was always smaller than that of the workforce working in factories. Now, however, the【B5】______ is almost always true in the newly industrialised world: the percentage of people living in cities is much higher than the percentage working in industry.
    Without a base of people working in industry, these cities cannot【B6】______their growth; there is not enough money to build adequate houses for the people that live there,【B7】______ the new arrivals. There has been little opportunity to build water supplies or other【B8】______. So, the figures for the growth of towns and cities【B9】______ proportional growth of unemployment and underemployment, a growth in the number of hopeless and【B10】______ parents and starving children.
【B1】

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答案alarming

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