我再看了下,好像确实应该C是对的
A.heavily accounts for almost half of the $20.8 billion increase in drug spending last year, the remainder of which came which指代不明确,两个句子中间没有连词
B.heavily were what accounted for almost half of the $20.8 billion increase in drug spending last year; the remainder of the increase coming 分号表示两个句子,第二个句子没有动词
C.heavily accounted for almost half of the $20.8 billion increase in drug spending last year, the remainder of the increase coming
D.heavily, accounting for almost half of the $20.8 billion increase in drug spending last year, while the remainder of the increase came drugs后面是that引导的从句,这句话缺少动词,句子不是完整的
E.heavily, which accounted for almost half of the $20.8 billion increase in drug spending last year, with the remainder of it coming which指代不明确,排除
不是NN,希望大家指正
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