The Glass House Mountains in Queensland, Australia, were : GMAT Sentence Correction (SC)
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# The Glass House Mountains in Queensland, Australia, were

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Joined: 07 Dec 2011
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The Glass House Mountains in Queensland, Australia, were [#permalink]

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07 Dec 2011, 21:06
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Difficulty:

5% (low)

Question Stats:

95% (01:47) correct 5% (00:00) wrong based on 20 sessions

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The Glass House Mountains in Queensland, Australia,
were sighted in 1770 by the English navigator Captain
James Cook, by whom they were named supposedly
because its sheer wet rocks glistened like glass

(A) by whom they were named supposedly because its
(B) by whom they were named supposedly and their
(C) naming them supposedly since their
(D) who so named them supposedly because their
(E) who so named it since supposedly their

My question: is it correct to have comma placed before "by whom".
What grammar is related to this structure "JC, by whom?
[Reveal] Spoiler: OA
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Re: need help with OG12 SC1！PLZ [#permalink]

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07 Dec 2011, 21:38
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Yea, the clause beginning with , (comma) is in passive voice. And that is why it is by whom. If it is in active voice, then it would have started by "who.."
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Re: need help with OG12 SC1！PLZ [#permalink]

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07 Dec 2011, 21:47
A--->Is incorrect

Because

1. It is in passive voice
2.Subject verb agreement is validated

Glass house mountains)plural) and its(singular)--------->Not valid

Hope this helps

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Re: need help with OG12 SC1！PLZ [#permalink]

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07 Dec 2011, 22:51
option D correctly modifies captain JC with relative clause
correct plural pronoun their for plural antecedent mountains
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Re: need help with OG12 SC1！PLZ [#permalink]

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08 Dec 2011, 02:36
medusa0901 wrote:
The Glass House Mountains in Queensland, Australia,
were sighted in 1770 by the English navigator Captain
James Cook, by whom they were named supposedly
because its sheer wet rocks glistened like glass

(A) by whom they were named supposedly because its
(B) by whom they were named supposedly and their
(C) naming them supposedly since their
(D) who so named them supposedly because their
(E) who so named it since supposedly their

My question: is it correct to have comma placed before "by whom".
What grammar is related to this structure "JC, by whom?

it is correct to comma placed before "by whom". Also follow the rule of restrictive and non-restrictive. In this case, use by whom is wrong. We need "who" instead, and "them" as well as "their" refer correctly to Mountains
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Re: need help with OG12 SC1！PLZ   [#permalink] 08 Dec 2011, 02:36
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