one quick question, let us discuss

tonydong · 发表于 2005-6-9 09:10:00

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, but should B use "Costs" instead of "cost"? , since the subject is single

薰衣紫草 · 发表于 2005-6-9 09:19:00

请下次把题目的出处写在标题里, if it's available. thanks.

我也认为应该用costs.

one quick question, let us discuss

one quick question, let us discuss

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