結構問題
1. Executives and federal officials say that the use of crack and cocaine is growing rapidly among workers, [U]significantly compounding the effects of drug and alcohol abuse, which already are a cost to business of [/U]more than $100 billion a year.
A. significantly compounding the effects of drug and alcohol abuse, which already are a cost to business of
B. significantly compounding the effects of drug and alcohol abuse, which already cost business
C. significantly compounding the effects of drug and alcohol abuse, already with business costs of
D. significant in compounding the effects of drug and alcohol abuse, and already costing business
E. significant in compounding the effects of drug and alcohol abuse, and already costs business
答案是(B)
我的问题如下
1. E错在哪里
2. significantly compounding the effects of drug and alcohol abuse是用来修饰哪一个单字或句子的，和前一句有什么关系，可以麻烦您把原来的句子写出来吗?
3. which所指为何?
2. During Roosevelt’s years in office, Black Americans began voting for Democrats rather than Republicans in national elections, but[U] Black support for [/U]Democrats at the state and local levels developed only after Harry Truman’s support of civil rights legislation.
我觉得題目画线的部分应该有错吧，应改成Black'a support for才对。
要不然从but开始的后半句有兩個動詞一為support另一為developed，如此以來不就是造成雙動詞了嗎， 不知道我这样的解读对不对，请指教,tks!
以下是引用jimmy221在2003-6-27 21:55:38的发言：
1。
E的错误在于and和谁平行，
significantly compounding the effects of drug and alcohol abuse是作为状语修饰整个句子，伴随状态。
which应该指代effects.
2
support有名词词性
感謝您的回信[em01]
1. 那我再請教你這個句子的原來樣子是否應該為
Executives and federal officials say that the use of crack and cocaine is growing rapidly among workers [U]and the use of crack and cocaine is[/U] significantly compounding the effects of drug and alcohol abuse
斜線的部分省略，前面再補上一個逗點，我的分析對嗎？
2. 我也覺得這裡的support是名詞的用法，但應改為所有格的用法才對吧
Black's support for
