The link between health and income seems pretty uncontroversial.【C1】______all

游客2024-08-01  11

问题    The link between health and income seems pretty uncontroversial.【C1】______all, healthy people can work longer and harder than sick people. Healthier children are【C2】______to stay in school longer and learn more,【C3】______more when they enter the workforce. Even across countries the【C4】______seems clear: those with better health are【C5】______richer.
   The researchers of the Massachusetts Institute of Technology are skeptical about the notion【C6】______healthier countries are richer, because countries with【C7】______incomes may simply spend more on health. To investigate, they needed to study health improvements that were not【C8】______by economic growth in the countries concerned.
   Beginning in the 1940s, several medical【C9】______involving penicillin (青霉素) and DDT (滴滴涕) made it easier to【C10】______diseases—such as tuberculosis (结核病), malaria (疟疾) and yellow fever—that【C11】______people in developing countries. Because these ideas【C12】______in the rich world and were spread by【C13】______such as the WHO, any improvement in【C14】______they led to would have been unconnected with prior improvements in the economic【C15】______of poor countries.
   This international revolution in public health【C16】______lead to substantial increases in life 【C17】______in poor countries by the 1950s. However, the researchers found that income per head actually【C18】______when life expectancy went up. The reason was that increased life expectancy led to a larger population using a【C19】______stock of things like land and capital,【C20】______depressing income per person. [br] 【C20】

选项 A、and
B、thus
C、but
D、however

答案 B

解析 depressing income per person在句中作伴随状语,此处空格后的内容与句子主干部分是因果关系。thus为副词,意为“因此;从而”,符合句意。and也可表示结果,但它是连词,不能接伴随状语;but和however表示转折关系,不符合句意。
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