The continental United States
receives an average of 30 inches of precipitation a year; transpiration from soil and from plants returns approximately 21 of the 30 inches to the atmosphere, while the balance of 9 inches contributes to the flow of streams and rivers.
(A) transpiration from soil and from plants returns approximately 21 of the 30 inches to the atmosphere, while the balance of 9 inches contributes to the flow
(E) as transpiration from soil and from plants return approximately 21 of the 30 inches to the atmosphere, the rest of the 9 inches contribute to the flow
我不明白E。旧prep上讲是as表比较错误。但as不是可以引导时间状语从句吗？"当……的时候"。如 、As you grow older，you will grow wiser。
如果除去单复数问题，E能不能对呢？
旧prep上的解释：
2) as的用法:as + n表示作为… , as +主语+谓语表示动作之间进行比较
(E) as使用有误,句子本意并不是对两个动作进行比较,而是称述两个事实;主谓不一致:return和
(E) as使用有误,句子本意并不是对两个动作进行比较,而是称述两个事实;主谓不一致:return和
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发表于 2011-11-4 21:47:38
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