关于一道SC and 的用法

b1tch · 发表于 2014-3-3 08:11:42

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
答案是B ！！
这个答案B的话 2个and 连接着3个词语也可以嘛？！

关于一道SC and 的用法

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