GWD23 Q21

chenyao16887

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 pollutant, having
这道题答案是B，但是A哪里错呢？？？很困惑地说。。。

peill

我还以为选C呢。B怎么是While引导的分词短语呢？

泠泠曲罢

A 最后部分的having修饰they-->就是指Industrialization and modern methods。。如果这样的话我们应该用GMAT的经典形式 have, have, and have

chenyao16887

那为什么不能理解为having....是结果状语，修饰前边的一系列？？

lijiazhou

那为什么不能理解为having....是结果状语，修饰前边的一系列？？

-- by 会员 chenyao16887 (2012/5/8 9:31:47)

可以理解为伴随或者结果的，既可以状语又可以定于的，最好就不要选having的a选项了，b比较具体的，明确that后面的定语从句修饰pollutants

chenyao16887

[/quote]

可以理解为伴随或者结果的，既可以状语又可以定于的，最好就不要选having的a选项了，b比较具体的，明确that后面的定语从句修饰pollutants

-- by 会员 lijiazhou (2012/5/8 10:48:41)

[/quote]
就是说having会造成歧义是吧。

laodudu3

我开始也是选C。
C错误在于which没有紧跟修饰对象，这个我一定要注意，都犯了好几次这样的错误了。

A的错误在于having的逻辑主语不是Industrialization and modern methods。