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  3. Aging poses a serious challenge to OECD (Organization of Economic Co-operation and Development) countries, in particular, how to

Aging poses a serious challenge to OECD (Organization of Economic Co-operation and Development) countries, in particular, how to

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问题     Aging poses a serious challenge to OECD (Organization of Economic Co-operation and Development) countries, in particular, how to pay for future public pension liabilities. And early retirement places an【C1】______ burden on pension financing. There is no easy solution, but【C2】______ retirement could help.
    Early retirement may seem like a worthy individual goal, but it is a socially【C3】______ one, and makes the present public pension system difficult to sustain for long. The【C4】______ reason is that more people are retiring early and living longer. That means more retirees depending on the【C5】______ of those in work for their income. The【C6】______ is worrying. In the next 50 years, low fertility rates and【C7】______ life expectancy in OECD countries will cause this old-age dependency rate to roughly double【C8】______ size. Public pension payments, which afford 30% ~ 80% of total retirement incomes in OECD countries, are【C9】______ to rise, on average, by over three percentage points in GDP and by as much as eight percentage points in some countries.【C10】______ is the pressure on pension funds that there is a danger of today’s workers not getting the pensions they expected or felt they【C11】______ for.
    Action is needed,【C12】______ simply aiming to reduce the【C13】______ (and cost) of public pensions, or trying to【C14】______ the role of privately funded pensions within the system, though necessary steps, may be【C15】______ to deal with the dependency challenge. After years of【C16】______ early retirement schemes to avoid【C17】______ and higher unemployment, many governments are now looking【C18】______ persuading people to stay in work until they are older. Surely, the thinking goes, if we are healthier now and jobs are physically less【C19】______ and unemployment is down, then perhaps the【C20】______ rate should rise anew.
【C4】
选项 A、substantial
B、essential
C、potential
D、controversial
答案B
解析 形容词辨析。根据上下文可知，空格处填入形容词修饰reason，说明“更多的人提早退休而寿命更长”是“当前的公共养老金系统难以持久”的……原因。本段下文都在论述这一原因，可见它是很重要的，因此B项essential“实质的，基本的”是正确答案。文章没有提及该原因是“潜在的，可能的”或“有争议的”，排除C项potential和D项controversial。A项substantial也有“实质的，本质的”含义，但它是指由于数量大而重要。
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