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agarwalva
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Modern inventions such as the pneumatic drill may seem to have improve Updated on: 01 Oct 2018, 02:15
Originally posted by agarwalva on 11 Apr 2012, 20:03.
Last edited by Bunuel on 01 Oct 2018, 02:15, edited 1 time in total.
Renamed the topic and edited the question.
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C
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70% (01:26) correct 30% (01:35) wrong based on 585 sessions

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Modern inventions such as the pneumatic drill may seem to have improved the work conditions of manual laborers, but in fact, have increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard involved in excavation and demolition.


(A) have increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard

(B) has increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard

(C) have increased the incidence of health hazards such as silicosis because they have aggravated the dust hazard

(D) increased the incidence of health hazards such as silicosis because they aggravated the dust hazard

(E) increased the incidence of health hazards such as silicosis because of aggravating the dust hazard



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i thgt after. the sentence is just talking about pneuumatic drill and hence all the verbs needs to be singular...
Modern inventions such as pneumatic drill .....
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C
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Modern inventions such as the pneumatic drill may seem to have improve 11 Apr 2012, 21:46
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The subject is actually "modern inventions" not pneumonic drilling.

Consider the following example . . . "Certain lakers such as Kobe Bryant HAVE played in the nba finals." we wouldn't say "certain lakers such as Kobe Bryant has played in the nba finals"

Does that example make sense?
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Modern inventions such as the pneumatic drill may seem to have improve 11 Apr 2012, 21:50
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The pneumatic drill is an example of modern inventions. Here the author is talking about modern inventions and not pneumatic drill in particular

a. have increased ... has aggravated - subject verb disagreement.
b. has increase... has aggravated - subject verb disagreement
c. correct
d. Missing verb
e. missing verb
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Modern inventions such as the pneumatic drill may seem to have improve 12 Apr 2012, 01:57
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(A) have increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard
S-V agreement
(B) has increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard
S-V agreement
(C) have increased the incidence of health hazards such as silicosis because they have aggravated the dust hazard
(D) increased the incidence of health hazards such as silicosis because they aggravated the dust hazard
Seem to + infinitive
(E) increased the incidence of health hazards such as silicosis because of aggravating the dust hazard
Seem to + infinitive; Awkward
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Modern inventions such as the pneumatic drill may seem to have improve 13 Apr 2012, 02:19
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Go through the construction :

Modern inventions may seem to have done X, but in fact, have done Y (subject is Plural inventions)
A/B/D/E are out

C is correct

Hope this clarifies..!!
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Modern inventions such as the pneumatic drill may seem to have improve 13 May 2014, 20:48
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Can't "They" in option C refer to "Workers"

Please correct my understanding ???
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Modern inventions such as the pneumatic drill may seem to have improve 14 May 2014, 10:50
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282552
Can't "They" in option C refer to "Workers"

Please correct my understanding ???

Same confusion.
I prefer the agreement with the meaning but not the tense.
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Modern inventions such as the pneumatic drill may seem to have improve 04 Jul 2017, 11:28
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I agree with C - however I want to know why 'they have aggravated' is not commented upon - are modern inventions a person (because we used 'they') - have increased......because IT has seems to be more sensible (though not given)
In such a case what do we pay attention to?
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Modern inventions such as the pneumatic drill may seem to have improve 05 Jul 2017, 07:45
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The subject here is modern inventions which is very far away from its pronoun .
The should be plural here and use of it is improper .
Only C has all the correct S-V agreement and proper nouns.
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Modern inventions such as the pneumatic drill may seem to have improve 29 Oct 2018, 06:44
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agarwalva
Modern inventions such as the pneumatic drill may seem to have improved the work conditions of manual laborers, but in fact, have increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard involved in excavation and demolition.


(A) have increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard

(B) has increased the incidence of health hazards such as silicosis because it has aggravated the dust hazard

(C) have increased the incidence of health hazards such as silicosis because they have aggravated the dust hazard

(D) increased the incidence of health hazards such as silicosis because they aggravated the dust hazard

(E) increased the incidence of health hazards such as silicosis because of aggravating the dust hazard



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i thgt after. the sentence is just talking about pneuumatic drill and hence all the verbs needs to be singular...
Modern inventions such as pneumatic drill .....

KAPLAN OFFICIAL EXPLANATION:



C

(A) has to be wrong, because “it” illogically refers to “silicosis.”Actually,“modern inventions,”plural, have aggravated the dust hazard.” So you need “they” to follow “because,” as in (C) and (D). There’s no reason to use the past, in (E), because the hazard is still hap- pening.
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Modern inventions such as the pneumatic drill may seem to have improve 29 Oct 2018, 20:11
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Subject -Modern inventions so verb need to be agreed with plural subject
Also usage of "have" is correct as per usage of "have" in non underline part
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Modern inventions such as the pneumatic drill may seem to have improve 29 Oct 2018, 20:26
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I want to know why : they " is used as is they referring to silicosis ,helath hazards,laborers or inventions .Since silicosis is a disease so it should be noun and "it"can aslo refer to that as per rules .
with meaning "they " is used for pneumatic drill which again is singular then why " they"
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Modern inventions such as the pneumatic drill may seem to have improve 06 Apr 2022, 06:58
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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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