9. Migraine, the most debilitating common form of headache, afflicts perhaps 18 million Americans, who collectively lose 64 million workdays a year, and they cost the nation $50 billion in medical expenses and lost work time.
(A) year, and they cost the nation $50 billion in medical expenses and lost
(B) year and thus cost the nation $50 billion in medical expenses and lost
(C) year, so as to cost the nation $50 billion in medical expenses and lost
(D) year that costs the nation $50 billion in lost medical expenses and(B)
(E) year, which thus cost the nation $50 billion in lost medical expenses and
这道题C为何不对呢?
505, sec20-09
只有B可被接受。有thus, 使cost和lose紧相连, cost 的逻辑主语是Americans, 为一般现在时, a year因为and的存在同样作用于cost(这样理解意思上更清楚)。cost可见的例句中主语都不是人发出的, 这里意思上说: 人(或是就把Americans当作一个东西看)在某方面耗费了国家钱,勉强也能说得通。cost用法还可参见og110。
C的
so as to多用于系表结构中。这里so as to可认为表达复杂, 且不能确定是Migraine cost还是Americans cost。
cost补充例句
nearly 130 million Americans are overweight or obese – a condition that cost the nation $117 billion in medical and other expenses in 2000.
It is estimated that cardiovascular diseases will cost our nation more than $368 billion in 2004
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I got it ,thanks !!!!!
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