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Rock samples taken from the remains of an asteroid about

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Rock samples taken from the remains of an asteroid about [#permalink] New post 06 May 2012, 09:55
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Question Stats:

56% (01:36) correct 43% (00:47) wrong based on 413 sessions
sravanth wrote:
Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

(A) has been dated to be 3.47 billion years old and thus is
(B) has been dated at 3.47 billion years old and thus
(C) have been dated to be 3.47 billion years old and thus are
(D) have been dated as being 3.47 billion years old and thus
(E) have been dated at 3.47 billion years old and thus are



Rock samples ---> plural subject. hence has been is incorrect and have been in correct.
Eliminate A and B.

Dated at is the correct idiom. hence E.
[Reveal] Spoiler: OA

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Re: Rock samples [#permalink] New post 06 May 2012, 18:01
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Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

(A) has been dated to be 3.47 billion years old and thus is
(B) has been dated at 3.47 billion years old and thus
(C) have been dated to be 3.47 billion years old and thus are
(D) have been dated as being 3.47 billion years old and thus
(E) have been dated at 3.47 billion years old and thus are ANSWER

The subject 'rock samples' is plural so both the verb after 'dinosaurs', 'have', and the verb before 'evidence', 'are', have to be plural.

The correct idiom is 'dated at.'

Hope that helps :).
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 17 Sep 2013, 05:58
easy breezy.. idiom usage. DATED AT and not dated to be.. therefore A, C and D out. Out of B and E , B uses HAS whereas samples-the subject is plural
There fore E is best.
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 18 Sep 2013, 00:58
dvinoth86 wrote:
sravanth wrote:
Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth.

(A) has been dated to be 3.47 billion years old and thus is
(B) has been dated at 3.47 billion years old and thus
(C) have been dated to be 3.47 billion years old and thus are
(D) have been dated as being 3.47 billion years old and thus
(E) have been dated at 3.47 billion years old and thus are



Rock samples ---> plural subject. hence has been is incorrect and have been in correct.
Eliminate A and B.

Dated at is the correct idiom. hence E.


Removing all the flabs i.e. here is the main sentence.

Rock samples ....[taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid tha......]has been dated to be 3.47 billion years old and thus is evidence of the earliest known asteroid impact on Earth

Rock samples is plural subject hence , 'Have' & 'are' required, dated to be - incorrect idiom usage.
Hence A, B eliminated
C Dated to be is wron indiom
D verb is missing

E - corrects Sub- verb agreement error and Idiom usage

Concept tested : SVA, IDIOM
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 26 Sep 2013, 09:42
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 05 Jan 2014, 10:47
Clearly, the ideom "dated AT" messed with me, for me it seems as if the dating of rock samples are happening AT some location when we use "dated AT".. Apparently though, it is the correct ideomatic usage and thus I stand corrected. (I picked C)
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 06 Jan 2014, 03:57
Appreciate if anybody can please suggest me the source of most comprehensive Idiom list.
Somehow I have got lot of lists but not sure which one is best suited

Thanks
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Re: Rock samples taken from the remains of an asteroid about [#permalink] New post 06 Jan 2014, 04:42
ardhenduchasing wrote:
Appreciate if anybody can please suggest me the source of most comprehensive Idiom list.
Somehow I have got lot of lists but not sure which one is best suited

Thanks


GMAC has moved away from testing SC solely on the basis of idioms. But still, you can go through the lists (no harm)

Please complete the below one and then proceed to others.

http://magoosh.com/gmat/2013/gmat-idiom-ebook/

gmat-idioms-comprehensive-list-of-gmat-idioms-80342.html
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Re: Rock samples taken from the remains of an asteroid about   [#permalink] 06 Jan 2014, 04:42
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