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Most efforts to combat such mosquito-borne diseases like

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 12 Oct 2012, 01:19
+1E

Like cannot introduce examples, eliminate A and B

Correct idiom is
On either….or
On either…on or

Eliminate C and D, as “on either…or on” is wrong idiom

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 06 Jan 2014, 05:05
macjas wrote:
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A and dengue have focused either on the vaccination of humans or on exterminating
B like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C as malaria and dengue have focused on either vaccinating humans or on exterminating
D as malaria and dengue have focused on either vaccinating of humans or on extermination of
E as malaria and dengue have focused on either vaccinating humans or exterminating


The correct ideom is "such.. as", A/B gone.

D is gone because the past participle is not parallel to extermination.

So... when we have parallel structures that already are preceded by "or", do we need to include "or" again? This dilemma took me at least 35 of the total 85 seconds.. Then I remembered the MGMAT SC book telling me that when or comes BEFORE, using it again is superfluous.. That's why E is better than C.

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 25 Mar 2014, 04:19
option A is not similar to the underlined part in the sentence

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 13 May 2014, 03:23
macjas wrote:
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A and dengue have focused either on the vaccination of humans or on exterminating
B like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C as malaria and dengue have focused on either vaccinating humans or on exterminating
D as malaria and dengue have focused on either vaccinating of humans or on extermination of
E as malaria and dengue have focused on either vaccinating humans or exterminating


I agree that E is best. but E is not perfect

in many other og problems on sc, gmat tells us to use dedicated noun, such as "attempt" , not doing such as "trying" , to refer to a general action. but in this problem , choice E, the oa, use doing " vaccination and exterminating" to refer to a general action,an action which is not caused by any noun in the sentence.

So, I conclude that the above rule is not obsolute rule. this is preferable rule. if it is an absolute rule, E can be eliminated immediately.

or, E is a mistake by gmat.
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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 21 May 2014, 19:19
daagh wrote:
Merely saying vaccinating may mislead. Used as an adjectival phrase, vaccinating humans may refer to those humans who do the job of vaccination. Vaccinating is a present participle and not a gerund in that instance. However, vaccinating of humans is out and out a gerund. That is why for use as a gerund, we may add the preposition of to be sure

Parallelism error is one of the most used aspects of sentence structure at least in GMAT. Although purely singular errors such as lack of parallelism alone may appear rarely in GMAT, the normal practice often is to cobble two or three errors together, of which parallelism will be one either as the primary error or as a secondary error.


Hi daagh -- thanks for the breakdown. Question for you regarding parallelism in answer choice B:

"on vaccinating of humans or on the extermination of" -- how does "the" affect parallelism? would parallelism still be ok if "the" was removed?

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 27 Nov 2014, 04:59
Hi

I just did this question but did not focus on the "such...as" idiom. Instead, I tried to figure out whether we should use "like" vs "as".
In my notebook I wrote down, that "like" can only compare nouns, pronouns and noun phrases, whereas "as" can only compare clauses.

Here, the comparison is b/w "malaria" and "dengue" (both are nouns), so I went with A or B.

Can someone please clarify/help with understanding?

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 27 Nov 2014, 09:06
mott wrote:
I just did this question but did not focus on the "such...as" idiom. Instead, I tried to figure out whether we should use "like" vs "as".
In my notebook I wrote down, that "like" can only compare nouns, pronouns and noun phrases, whereas "as" can only compare clauses.

Here, the comparison is b/w "malaria" and "dengue" (both are nouns), so I went with A or B.

Can someone please clarify/help with understanding?

Well, your clarified yourself actually because indeed the structure is such...as.

Also, the usage of like would be inappropriate because there is no comparison here. Malaria and dengue are just given as two examples of mosquito-borne diseases. This is a very classical usage of such as: to give examples.

p.s. Our book EducationAisle Sentence Correction Nirvana discusses as/like/such as, their application and examples in significant detail. If someone is interested, PM me your email-id, I can mail you the corresponding section.
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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 28 Nov 2014, 07:14
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A and dengue have focused either on the vaccination of humans or on exterminating - Such as is right idiom
B like malaria and dengue have focused either on vaccinating of humans or on the extermination of - Same as A
C as malaria and dengue have focused on either vaccinating humans or on exterminating - '' on either A or B '' OR '' Either on A or on B '' is correct.
D as malaria and dengue have focused on either vaccinating of humans or on extermination of - Same as C
E as malaria and dengue have focused on either vaccinating humans or exterminating - Correct.
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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 12 Dec 2014, 03:35
Split 1 : such ... as is the correct idiom..A & B out
Second Split : either...or usage. Immediate words on right side of either as well as or should be same to maintain parallelism. Hence, C & D out.
IMO : E

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 21 Jan 2016, 23:21
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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New post 21 Jan 2016, 23:35
daagh wrote:
As an addendum to my earlier posting, let may say that all the five choices in the context are active voice sentences; so the use of active versus passive voice is not tested here. In addition, Choice C, D and E use the template: such as x and y and not such x as y

Is such x as y even a separate idiom? I thought it meant the same as such as x and y.

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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 02 Feb 2016, 23:46
Such X as Y is different from such as X and Y. The former refers to the intensity while the latter is used to state examples.
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New post 29 Aug 2016, 08:03
Why is C wrong?
I was between C and E but chose C because I though it was parallel.

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New post 07 Nov 2016, 06:40
Split1) Parallelism when doing comparison. "such….as" is correct. "such…like" is incorrect. You can use like as an option to list items similar to the use of the word such. The issue is that you cannot use like and such in a same sentence. Either or. A & B are out.

Split2) Comparison. "either on x or on y" or "on either x or y" are correct. C and D are out. To add to this. D and E are not parallel in the way they present.."vaccinating...extermination" is not parallel. C and D are out.

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New post 14 May 2017, 14:23
macjas wrote:
The Official Guide for GMAT Review 2017

Practice Question
Question No.: SC 796
Page: 708

Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the vaccination of humans or on exterminating mosquitoes with pesticides.

A and dengue have focused either on the vaccination of humans or on exterminating
B like malaria and dengue have focused either on vaccinating of humans or on the extermination of
C as malaria and dengue have focused on either vaccinating humans or on exterminating
D as malaria and dengue have focused on either vaccinating of humans or on extermination of
E as malaria and dengue have focused on either vaccinating humans or exterminating


A "Such like" is not idiomatic.
B "Such like" is not idiomatic.
C "Either" after "on" means that "on" should not be repeated within this list.
D "Either" after "on" means that "on" should not be repeated within this list.
E Correct.

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New post 27 Jun 2017, 13:12
Most efforts to combat such mosquito-borne diseases like malaria and dengue have focused either on the
vaccination of humans or on exterminating mosquitoes with pesticides.

A. like malaria and dengue have focused either on the vaccination of humans or on exterminating
Usage of “like” to present examples is incorrect

B. like malaria and dengue have focused either on vaccinating of humans or on the extermination of
Same error as in option A

C. as malaria and dengue have focused on either vaccinating humans or on exterminating
Parallelism Error : “on either VH or ET” is correct …since “on” is outside the “either..or” structure

D. as malaria and dengue have focused on either vaccinating of humans or on extermination of
Parallelism Error : “on either VH or ET” is correct …since “on” is outside the “either..or” structure

E. as malaria and dengue have focused on either vaccinating humans or exterminating
Correct
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Re: Most efforts to combat such mosquito-borne diseases like [#permalink]

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New post 11 Oct 2017, 09:18
“either on the vaccination of humans or on exterminating”

Is this parallel? Both “either” and “or” have prep phrases that start with “on”. Or is this not parallel because “vaccination” doesn’t match “exterminating”?

“either on vaccinating of humans or on the extermination of”

Same question as I put above. Both the X and Y elements here start with the preposition “on”. Is “on” alone enough to make these elements parallel? Do the “vaccinating” and “extermination” portions of the X and Y element matter?

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Most efforts to combat such mosquito-borne diseases like [#permalink]

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PurpleDrank3000 wrote:
“either on the vaccination of humans or on exterminating”

Is this parallel? Both “either” and “or” have prep phrases that start with “on”. Or is this not parallel because “vaccination” doesn’t match “exterminating”?

“either on vaccinating of humans or on the extermination of”

Same question as I put above. Both the X and Y elements here start with the preposition “on”. Is “on” alone enough to make these elements parallel? Do the “vaccinating” and “extermination” portions of the X and Y element matter?



Hello PurpleDrank3000,


You certainly ask a good question here. :thumbup:



However, there are certain considerations here.

Firstly, vaccinating of humans is an incorrect expression. We can say vaccinating humans or vaccination of humans.

Similarly, we can use extermination of mosquitoes or exterminating mosquitoes in the context of this sentence.

So let's work with these expressions.

As long as the sentence uses either X or Y, either on vaccinating humans or on the extermination of mosquitoes AND/OR either on vaccination of humans or on exterminating mosquitoes will be parallel because ultimately both either and or are followed by prepositional phrases.


But suppose if this sentence only uses the parallel marker or and not either X or Y, then in that case neither vaccinating humans can be parallel to the extermination of mosquitoes nor vaccination of humans will be parallel to exterminating mosquitoes.

The verb-ing noun forms cannot be parallel to a conventional noun. The reason for the same is that verb-ing nouns denote action while the conventional nouns denote a person, a place, or a thing.


Coming back to the official sentence, we see that the correct answer choice uses perfect parallelism even after the preposition on because a parallel list must be as much parallel as possible. If the two expressions can be written in identical form, then they must be written so.



Hope this helps. :-)
Thanks.
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New post 11 Oct 2017, 14:43
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PurpleDrank3000 wrote:
“either on the vaccination of humans or on exterminating”

Is this parallel? Both “either” and “or” have prep phrases that start with “on”. Or is this not parallel because “vaccination” doesn’t match “exterminating”?

“either on vaccinating of humans or on the extermination of”

Same question as I put above. Both the X and Y elements here start with the preposition “on”. Is “on” alone enough to make these elements parallel? Do the “vaccinating” and “extermination” portions of the X and Y element matter?



Hello PurpleDrank3000,


You certainly ask a good question here. :thumbup:



However, there are certain considerations here.

Firstly, vaccinating of humans is an incorrect expression. We can say vaccinating humans or vaccination of humans.

Similarly, we can use extermination of mosquitoes or exterminating mosquitoes in the context of this sentence.

So let's work with these expressions.

As long as the sentence uses either X or Y, either on vaccinating humans or on the extermination of mosquitoes AND/OR either on vaccination of humans or on exterminating mosquitoes will be parallel because ultimately both either and or are followed by prepositional phrases.


But suppose if this sentence only uses the parallel marker or and not either X or Y, then in that case neither vaccinating humans can be parallel to the extermination of mosquitoes nor vaccination of humans will be parallel to exterminating mosquitoes.

The verb-ing noun forms cannot be parallel to a conventional noun. The reason for the same is that verb-ing nouns denote action while the conventional nouns denote a person, a place, or a thing.


Coming back to the official sentence, we see that the correct answer choice uses perfect parallelism even after the preposition on because a parallel list must be as much parallel as possible. If the two expressions can be written in identical form, then they must be written so.



Hope this helps. :-)
Thanks.
Shraddha


Thank you. This is very helpful.

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