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Scientists have found signs that moving water changed the

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Scientists have found signs that moving water changed the [#permalink]

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New post 09 Oct 2010, 20:58
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Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras, therefore concluding that its crust is harboring up to three times as much water than was previously thought.

(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
(C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as
(D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
(E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was

[Reveal] Spoiler:
SPOILER:
Explain for me the "as well as previously thought" I don't get this.
[Reveal] Spoiler: OA

Last edited by JarvisR on 15 Jul 2015, 02:48, edited 1 time in total.
Formatted & moved the comments under spoiler
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 09 Oct 2010, 22:49
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A problem of using the correct comparative idiom

A. As much water than - wrong
B. as much water or more as water – wrong; should be at least as much water as or more water than to mean a sensible comparison
C. up to three times as much water as – correct idiom
D. as much water, or more, than - wrong. The completing as is missing and a comma is unduly intruding after more
E. more water as was - wrong; more water than is required.
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 09 Oct 2010, 22:52
Explain for me the "as well as previously thought" I don't get this.

Does this question pertain to this problem?
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 10 Oct 2010, 00:24
the correct idiom is AS ... AS (do not miss 2nd one)
if there is COMPARATIVE form, there comes THAN
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 26 Apr 2011, 14:36
+1 C

Parallelism.
Idioms: "more" requires "than", otherwise it is wrong.
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 26 Apr 2011, 18:43
It makes me wonder if the GMAT keep the sentences correctly punctuated. I did not eliminate using idioms. Haha! I just saw that therefore should follow semicolon... and leaves me with C and D... But D has two stand alone clause not separated by a comma and AND...

So I got C. Hmmm... Wonder if that was pure coincidence

gautrang wrote:
Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras, therefore concluding that its crust is harboring up to three times as much water than was previously thought.

(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
(C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as
(D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
(E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was



SPOILER:






Explain for me the "as well as previously thought" I don't get this.
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 27 Apr 2011, 03:25
gautrang wrote:
Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras, therefore concluding that its crust is harboring up to three times as much water than was previously thought.

(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
(C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as
(D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
(E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was


SPOILER:


Explain for me the "as well as previously thought" I don't get this.


It may sound rude but does it take too much to underline the incorrect part? to me a senetence with out underline looks like a gibrish all over :(
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 04 May 2011, 03:22
gautrang wrote:
Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras, therefore concluding that its crust is harboring up to three times as much water than was previously thought.

(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
(C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as
(D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
(E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was



SPOILER:






Explain for me the "as well as previously thought" I don't get this.


A) Lack of parallelism
Scientists have found signs......eras, therefore concluding that .....
B) Out for same reason.
C) Seems good..keep it on hold.
D) Wrong: as much water, or more, than
E) Wrong: times more water as was

So it is C.
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 04 Dec 2014, 09:45
Hello from the GMAT Club VerbalBot!

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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 02 Jan 2015, 06:50
A , B are wrong because we have IC connected to another IC by a comma .

the idiom is as much as or more than
In D 'as much , more than' is incorrect
In E 'more as' is incorrect

That keeps us with C which is the correct answer
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 07 Jun 2016, 04:48
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: Scientists have found signs that moving water changed the [#permalink]

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New post 03 Aug 2016, 11:51
Here is the notes that I got from Thrursday's with Ron session on March, 26 2015 The use of AND

See the video from 31:40 to 48:00 below


Analysis:
- 2 Actions: The scientists ..
Action (1) ... found evidence
Action (2) ... concluded XXXXX
Separate, or Two aspects of the same action
Here the actions are ..
found evidence .. (evaluated it for some time) .. then concluded it ..
So, Action (2) is not instantaneous with Action (1)

- Option (A),(B) usage of ", __ing" is WRONG !!!

Example: Scientists have found signs that moving water existed on Mars in the planet's recent history, disproving the idea that Mars has always been dry.
Here "found signs" and ", disproving" are instantaneous actions. So usage of ",__ing" is correct here.

- Option (D) usage of ".. three time as much, or more, than ... " (need to use "AS MUCH AS" not "AS MUCH THAN")

- Option (E) usage of ".. is harboring .." means this is happeneing right now.. not what we mean.

Answer (C)
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Re: Scientists have found signs that moving water changed the [#permalink]

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New post 13 Oct 2016, 09:53
Scientists (parallel elements)
- have found
- concluding

(A) eras, therefore concluding that its crust is harboring up to three times as much water than was
- continuous tense is unnecessary. As X as construct missing. “Was” is redundant as “thought” is in past tense already
(B) eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
- continuous tense is unnecessary. “Was” is redundant as “thought” is in past tense already
(C) eras and have therefore concluded that the planet's crust harbors up to three times as much water as
- correct
(D) eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
– "as a result of missing" with "therefore" as a modifier. More X than Y construct missing and As X as construct not correct.
(E) eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was
– as a result of missing with therefore as a modifier. More X than Y construct missing. Continuous tense is unnecessary. “Was” is redundant as “thought” is in past tense already


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Re: Scientists have found signs that moving water changed the   [#permalink] 13 Oct 2016, 09:53
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