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Industrialization and modern methods of insect control have

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Industrialization and modern methods of insect control have [#permalink] New post 07 Jul 2008, 15:43
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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
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Re: SC question [#permalink] New post 07 Jul 2008, 16:08
You're right- answer is B.
Why can't we use "But" here? I thought the usage of but would indicate a contrast between the good and bad effects...
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Re: SC question [#permalink] New post 08 Jul 2008, 07:17
rao_1857 wrote:
fwl200 wrote:
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
modifier confusion they refering to "Industrialization and modern methods of insect control " or "insect control" it self

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
modifier confusion
d. but introducing some 100,000 dangerous chemical pollutants at the same time that have
shouldn't use But
e. but at the same time introducing some 100,000 dangerous chemical pollutants, having
shouldn't use But


By PoE ... I think the correct answer is B


This is a wrong assumption. Using 'But' is not wrong. The issue lies elsewhere

I guess by now you would have narrowed it down to between b and e.
If not let me explain

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

In e having seems to modify chemical pollutants. This is wrong. It is not the just the chemical pollutants that have gone virtually unregulated but rather 'introducing some 100,000 dangerous chemical pollutants'. This is what makes e wrong.

Hope it helped!!
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Re: SC question [#permalink] New post 08 Jul 2008, 07:37
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

Why should c not be right: I think they cannot refer to anything else other than Industri...and..... also "introduced" seems to be parallel!!!

Is there some other problem with C - redundancey could be one "have"..but I cant rule that out based on this???
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Re: SC question [#permalink] New post 08 Jul 2008, 07:57
iamcartic wrote:
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

Why should c not be right: I think they cannot refer to anything else other than Industri...and..... also "introduced" seems to be parallel!!!

Is there some other problem with C - redundancey could be one "have"..but I cant rule that out based on this???


I also thought C is the best. But here we need participle due to the at the same time but C uses have introduced..which makes C wrong.
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Re: SC question [#permalink] New post 08 Jul 2008, 08:46
fwl200 wrote:
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, havingb. 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



C is wrong because "which" incorrectly modifies "time"


B is the best
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Re: SC question [#permalink] New post 08 Jul 2008, 09:22
fwl200 wrote:
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


The SC means :
1. Industrialization and modern methods of insect control have improved the standard of living around the globe
2. Industrialization and modern methods of insect control have introduced chemical pollutants because
3. Chemical pollutants were introduced because Industrialization and modern methods of insect were not regulated

A,E - modifier issue : "having " modifies "pollutants" incorrectly
C - "which " modifies "time"
D - "that" modifies " pollutants" incorrectly
B wins
Re: SC question   [#permalink] 08 Jul 2008, 09:22
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