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  3. Warren Buffett, who will host Berkshire Hathaway’s annual shareholders’ meeting on May 3rd, is an icon of American capitalism. A

Warren Buffett, who will host Berkshire Hathaway’s annual shareholders’ meeting on May 3rd, is an icon of American capitalism. A

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问题     Warren Buffett, who will host Berkshire Hathaway’s annual shareholders’ meeting on May 3rd, is an icon of American capitalism. At 83, he also epitomizes a striking demographic【C1】________: for highly skilled people to go on working well into【C2】________was once thought to be old age. Across the rich world, well-educated people【C3】________work longer than the less-skilled. Some 65％ of American men aged 62-74 with a professional degree are in the【C4】________, compared with 32％ of men with only a high-school certificate. In the European Union the pattern is similar.
    This【C5】________is part of a deepening divide between the well-educated【C6】________and the unskilled poor that is slicing【C7】________all age groups. Rapid innovation has raised the incomes of the highly skilled while【C8】________those of the unskilled. Those at the top are working longer hours each year than those at the bottom.【C9】________the well-qualified are extending their working lives, compared with those of less-educated people. The【C10】________, for individuals and society, are profound.
    The world is on the【C11】________rise in the number of old people, and they will live longer than ever before.【C12】________the next 20 years the global population of those aged 65 or more will almost double, from 600m to 1. 1 billion. The【C13】________of the 20th century, when greater longevity translated into more years in retirement【C14】________more years at work, has persuaded many observers that this shift will【C15】________slower economic growth and "secular stagnation", while the【C16】________ranks of pensioners will bust government budgets.
    But the notion of a sharp division between the working young and the【C17】________old misses a new trend, the【C18】________gap between the skilled and the unskilled. Employment rates are falling among younger unskilled people,【C19】________older skilled folk are working longer. The divide is most extreme in America, where well-educated baby-boomers are【C20】________retirement while many less-skilled younger people have dropped out of the workforce.  
【C12】
选项 A、Over
B、About
C、On
D、Until
答案A
解析 介词辨析题。A项Over在……期间；B项About关于；C项On在……上；D项Until直到。首先on与year不搭配，可以排除C项。A项over the next 20 years表示“在未来20年内”，over加时间表示“在一段时间内”，该项符合语义。而B项about代入原文表示“大约未来20年”；D项Until代入表示“直到未来20年”，这两项可以搭配，但不符合语义，故排除。故答案为A项。
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