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# According to United States Air Force officials, a cannon

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Intern
Joined: 26 Feb 2007
Posts: 16
According to United States Air Force officials, a cannon  [#permalink]

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14 Aug 2007, 10:13
3
11
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Difficulty:

(N/A)

Question Stats:

54% (00:40) correct 46% (00:49) wrong based on 159 sessions

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According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when jets fly into a flock of large birds.

(B) shooting dead chickens at airplanes has proved itself helpful as a demonstration of
(D) that shoots dead chickens at airplanes proves itself helpful to demonstrate
(E) that shoots dead chickens at airplanes has proved helpful in demonstrating
Director
Joined: 31 Mar 2007
Posts: 548
Re: According to United States Air Force officials, a cannon  [#permalink]

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14 Aug 2007, 14:01
1
It's the cannon that HAS proved helpful, not the chickens shooting out of the cannon (that's actually NOT helpful!).

proves helpful etc isn't a real sentence

so it's E
VP
Joined: 28 Mar 2006
Posts: 1295
Re: According to United States Air Force officials, a cannon  [#permalink]

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14 Aug 2007, 14:39
1800rajesh@gmail.com wrote:
55. According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when jets fly into a flock of large birds.
(B) shooting dead chickens at airplanes has proved itself helpful as a demonstration of
(D) that shoots dead chickens at airplanes proves itself helpful to demonstrate
(E) that shoots dead chickens at airplanes has proved helpful in demonstrating

Original is wrong 'cos cannon shooting dead chicken the sounds like all the words in RED modify chicken.

a relative pronoun "that" makes things clear by indicating that the cannon is shooting dead chicken and also introduces a clause.

"In demonstrating" is a noun clause in the objective form.

E stands
VP
Joined: 24 Jul 2011
Posts: 1496
GMAT 1: 780 Q51 V48
GRE 1: Q800 V740
Re: According to United States Air Force officials, a cannon  [#permalink]

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19 May 2012, 03:18
1
'proves itself helpful' means demonstrates its own utility. The cannon is not demonstrating the reason for its own existence, but rather helping to demonstrate the kind of damage that can result when birds fly into jets.

Between A and E, E is better because it uses the phrase 'that shoots dead chickens' instead of 'shooting dead chickens'. The former describes a type of canon that has been helpful because it can shoot dead chickens at airplanes. The latter describes any canon shooting dead chickens at airplanes.

E it is.
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Joined: 31 Aug 2011
Posts: 168
Re: According to United States Air Force officials, a cannon  [#permalink]

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17 Aug 2012, 09:18
According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when jets fly into a flock of large birds.

The sentence contains ing modifier without a comma so shooting dead chickens modifies cannon , there is ambiguity about what has proved helpful to demonstrate (the cannon itself or the act of shooting , it can be removed by placing a comma after the modifying clause e.g. shooting dead chickens at airplanes, has proved . . . . ) E clarifies this ambiguity by using different construction and it is clear that cannon has proved useful not the act of shooting.
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Re: According to United States Air Force officials, a cannon  [#permalink]

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30 Oct 2018, 23:28
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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Re: According to United States Air Force officials, a cannon &nbs [#permalink] 30 Oct 2018, 23:28
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