老prep1-97 代词指代问题

syxphoebe

97. (29753-!-item-!-188;#058&003991)

Industrialization and modern methods of insect control have improved the standard of living around

the globe while at the same time they have introduced some 100,000 dangerous chemical

pollutants, having gone virtually unregulated since they were developed more than 50 years ago.

(A) while at the same time they have introduced some 100,000 dangerous chemical pollutants, having

(B) while at the same time introducing some 100,000 dangerous chemical pollutants that have

(C) while they have introduced some 100,000 dangerous chemical pollutants at the same time, which have

(D) but introducing some 100,000 dangerous chemical pollutants at the same time that have

(E) but at the same time introducing some 100,000 dangerous chemical pollutants, having--------B

笔记：

(A)第二个they有指代不清的嫌疑,    既可能指代第一个they所指代的Industrialization and modern methods of insect control又可以指代chemical pollutants。

对于笔记上所说的they的指代不太明白。为什么可以向后指代chemical pollutants呢？语法和逻辑上应该都不对吧。

bingzi_bj

应该这样说，第二个they只能指代chemical pollutants，第一个they只能指代Industrialization and modern methods，2个they不指代同一事物

syxphoebe

以下是引用bingzi_bj在2009-5-10 0:52:00的发言：

应该这样说，第二个they只能指代chemical pollutants，第一个they只能指代Industrialization and modern methods，2个they不指代同一事物

啊哦~这个样子啊~明白啦~西西~ 谢谢bingzi_bj ^^