The world is on the top of a staggering rise in the number of old people, and they will live longer than ever before.【C1】_______

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问题     The world is on the top of a staggering rise in the number of old people, and they will live longer than ever before.【C1】________the next 20 years the global population of those aged 65 or more will almost double, from 600m to 1.1 billion. The experience of the 20th century, when longer life【C2】________more years in retirement rather than more years at work, has persuaded many observers that this shift will lead to slower economic growth and【C3】________, while the swelling ranks of pensioners will smash government【C4】________.
    But the notion of a sharp division between the working young and the【C5】________old misses a new trend, the growing gap between the skilled and the unskilled. Employment rates are falling among younger unskilled people,【C6】________older skilled folk are working longer. The【C7】________is most extreme in America, where well-educated baby-boomers are【C8】________retirement while many less-skilled younger people have dropped out of the workforce.
    Policy is【C9】________responsible. Many European governments have abandoned policies that used to encourage people to retire early. Longer life, combined with the replacement of generous pension plans【C10】________meaner ones, means that even the better-off must work longer to have a【C11】________retirement. But the changing nature of work also plays a big role. Pay has risen sharply for the highly educated, and those people continue to【C12】________rich rewards into old age because these days the educated elderly are more productive than their【C13】________Technological change may well reinforce that shift: the skills that【C14】________computers, from management expertise to creativity, do not necessarily【C15】________with age.
    This trend will benefit not just【C16】________elderly people but also, in some ways, society as a whole. Growth will slow less dramatically than expected; government revenues will be in better【C17】________as high earners pay taxes for longer. At the other end of the social scale, however, things look【C18】________. Manual work gets harder as people get older. The rapid innovation has raised the incomes of the highly skilled while【C19】________those of the unskilled. The consequences, for individuals and society, are【C20】________.
【C10】

选项 A、before
B、for
C、after
D、with

答案D

解析 空格后的ones指代空格前的pension plans。修饰ones的限定词meaner则与generous相对应。由此可推断所需介词应搭配replacement使用。根据replace…with…“用……代替……”的搭配。D项with也同样可搭配replacement。A项before和C项after表示的是时间上的先后顺序,不能满足句子的逻辑要求。B项for代入后构成replacement for…的常用搭配,但for后应是被替代的事物。
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