Although the United States cherishes the tradition that it is a nation of small towns and wide open spaces, only one in every ei

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问题     Although the United States cherishes the tradition that it is a nation of small towns and wide open spaces, only one in every eight Americans now lives on a farm. The【B1】population trend has been a double one, toward both urbanization and suburbanization, Metropolitan areas have grown explosively in the past decade and nearly half this increase has been in the【B2】, With the rapid growth of cities has come【B3】rapid decentralization. The flight of Americans from the central city to the suburbs【B4】one of the greatest migrations of modern times; quiet residential sections outside cities have become conglomerations of streets, split-level houses, and shopping centers.
    【B5】, this spurt of suburban expansion does not alter the basic fact that the United States【B6】one of the most urban nations on the face of the earth. Census Bureau【B7】show that the【B8】population has been shrinking steadily since 1880. When the United States became a nation it had no large cities at all; today【B9】fifty cities have populations of more than 258,000. Mammoth complexes of cities are developing in the area of the East Coast and the east north central states, on the pacific and Gulf coasts, and near the shores of the Great Lakes. Some sociologists now regard the entire 600-mile stretch between Boston and Washington, D.C.—an area holding a fifth of the country’s population—【B10】one vast city or, as they call it, megalopolis.

选项 A、past
B、recent
C、future
D、nowadays

答案B

解析 本题考的是对语篇上下文的理解,第一句中说到了"虽然美国珍惜其作为一个小镇与辽阔土地之国的传统,但如今只有1/8的美国人生活在农场里",这表明现在的人口趋势才具有双重性,故选recent 。该空应填形容词,而nowadays为副词。
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