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[Sentence Correction]
试题详情
题目：
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.
选项:
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, and have
D、 but introducing some 100,000 dangerous chemical pollutants at the same time that have
E、 but at the same time introduce some 100,000 dangerous chemical pollutants, having
答案:
B
提问：
王文静老师，你好，我的分析思路是这样的AE选项having修饰对象错误所以排除了，D选项but前后结构不对称，前面是个句子，but后面是动名词形式，而C选项and have修饰关系也不对，应该不是并列关系。但B选项我不太清楚为什么用introducing是可以的，因为while也是连词，既然while前面是句子，那while后面也应该是句子才对。还有就是我在模考软件里面C选项and have变成了which have，如果这样的话是不是C选项更好呢
解答：
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