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大家帮忙看看这道题,,

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楼主
发表于 2003-8-19 04:42:00 | 只看该作者

大家帮忙看看这道题,,

16. 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
(E) year, which thus cost the nation $50 billion in lost medical expenses and


the answer is B
I am just wondering what is the difference between B and C.
沙发
发表于 2003-8-19 13:40:00 | 只看该作者
so as to用法十分死板,只用于简单的系表结构,to后面的动作的发出者就是句子的主语。
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