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Leaching, the recovery of copper from the drainage water of

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Director
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Leaching, the recovery of copper from the drainage water of [#permalink]

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New post 13 Feb 2006, 21:05
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Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.

(A) as a method of the extraction of minerals, it was well established
(B) as a method of the extraction of minerals well established
(C) was a well-established method of mineral extraction
(D) was a well-established method of extracting mineral that was
(E) had been a method of mineral extraction, well established
VP
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 [#permalink]

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New post 13 Feb 2006, 21:20
Agree with C.

BTW, the non-underlined portion also has a mistake...:)
Director
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 [#permalink]

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New post 13 Feb 2006, 21:58
stuck between C and E.

but will go with C .

E has past perfect tense which makes sense here because leaching was a method in eighteenth century and miners made the discovery untill 25 year ago...
but because in E appositive "well established as early as the eighteenth century" seems to modify mineral extraction. which is wrong.

SC gurus pls explain this

OA...?


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New post 13 Feb 2006, 22:02
Leeching may still be an on going method...don't think past perfect is necessary.

cool_jonny009 wrote:
stuck between C and E.

but will go with C .

E has past perfect tense which makes sense here because leaching was a method in eighteenth century and miners made the discovery untill 25 year ago...
but because in E appositive "well established as early as the eighteenth century" seems to modify mineral extraction. which is wrong.

SC gurus pls explain this

OA...?


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 [#permalink]

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New post 14 Feb 2006, 05:41
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IMO,

"E" distorts the meaning slightly (apart from using past perfect)

X had been a method of mineral extraction, well established as early as the eighteenth century

Separates "well established" from the "method".... poor modifier.

Actually, we need to place "well extablished" close to "method" for effective modification!
Director
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New post 14 Feb 2006, 06:16
I think E...

In C: Leaching was a well established method of mineral extraction as early as the eighteen century... Doesn't that look incorrect?

In D: Leaching had been a method of mineral extraction, well established as early as the eighteenth century.... later on we talk about the events which occured in the past and are not taking part today....

I definetely think it is E....
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Re: SC: copper [#permalink]

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New post 14 Feb 2006, 08:21
IMO its C

In E, 'had been' denotes that 'leaching' is no longer used, however, the original sentence does not convey this message across.

It only says that until about 25 years ago, miners didn't realize that bacteria taken an active part in the process, it doesn't say that 'until about 25 years ago, miners used another process'
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Director
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 [#permalink]

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New post 14 Feb 2006, 08:46
OA is C. Good try everyone.
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Re: SC: copper [#permalink]

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New post 17 Feb 2006, 21:58
TeHCM wrote:
IMO its C

In E, 'had been' denotes that 'leaching' is no longer used, however, the original sentence does not convey this message across.

It only says that until about 25 years ago, miners didn't realize that bacteria taken an active part in the process, it doesn't say that 'until about 25 years ago, miners used another process'


Agreed on (C).

BTW: TeHCM, when are Miranda and Steve going to get back together?
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Re: SC: copper [#permalink]

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New post 17 Feb 2006, 22:04
GMATT73 wrote:
TeHCM wrote:
IMO its C

In E, 'had been' denotes that 'leaching' is no longer used, however, the original sentence does not convey this message across.

It only says that until about 25 years ago, miners didn't realize that bacteria taken an active part in the process, it doesn't say that 'until about 25 years ago, miners used another process'


Agreed on (C).

BTW: TeHCM, when are Miranda and Steve going to get back together?


LOL. Actually they are married now :lol:

I love rewarding myself with episodes of SATC after some studying..... :wink:
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Manager
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reply [#permalink]

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New post 17 Feb 2006, 22:15
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.

(A) as a method of the extraction of minerals, it was well established
awful, rejected..
(B) as a method of the extraction of minerals well established
same reason as a)
(C) was a well-established method of mineral extraction
sounds good
(D) was a well-established method of extracting mineral that was
wordy
(E) had been a method of mineral extraction, well established

leaching...had been a method of minneral extraction, well...., but until

somehow had been suggests that leaching is no longer the established method of extracting minerals...to me, nothing in the passage suggests that..
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Re: SC: copper [#permalink]

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New post 29 Jun 2007, 12:26
shahnandan wrote:
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria taken an active part in the process.

(A) as a method of the extraction of minerals, it was well established
(B) as a method of the extraction of minerals well established
(C) was a well-established method of mineral extraction
(D) was a well-established method of extracting mineral that was
(E) had been a method of mineral extraction, well established


The question does not even make sense. taken is an adjective and bacteria is a noun. Should it be bacteria takes?
Manager
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Re: SC: copper [#permalink]

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New post 05 Nov 2009, 20:40
For me the Answer is C

Because “after miners realize that bacteria is taking an active part in the process” the process of “leaching” is could have been stopped/could not have been stopped.

So IMO the past perfect is not required.

Anybody chip in and explain
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Re: Leaching, the recovery of copper from the drainage water of [#permalink]

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New post 24 Oct 2014, 05:42
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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: Leaching, the recovery of copper from the drainage water of [#permalink]

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New post 20 May 2017, 03:52
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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: Leaching, the recovery of copper from the drainage water of   [#permalink] 20 May 2017, 03:52
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