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To: 楼主 (173楼)
505. 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.
(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
(E) year, which thus cost the nation $50 billion in lost medical expenses and
但是我在做该题的时候选了E,是因为我认为E中cost的主语是64 million workdays a year cost the nation...,挺通顺的。
---〉我当时考G时结合新东方语法笔记总结过定语从句关系词指代
that、which指代前一个词,which前有逗号,一般指代逗号前最近的名词,除非主谓搭配不当;但注意that、which任何情况下都不能指代前面整句句子。
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