Art historians are using a process known as infrared : GMAT Sentence Correction (SC)
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# Art historians are using a process known as infrared

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Intern
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Art historians are using a process known as infrared [#permalink]

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13 Feb 2006, 21:51
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Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

b) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed

c) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed

d) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done

e) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done
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VP
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13 Feb 2006, 21:55
I think that I messed this one up..will wait for OA/OE.

Last edited by lhotseface on 13 Feb 2006, 21:59, edited 2 times in total.
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13 Feb 2006, 21:55
C.

A- sounds as though the artists also sketched the Mona Lisa

B- "whether" needs to be used (when considering possibilities)

C- right (whether is used, and it makes it clear that using black was a practice)

D-same as A

E- a practice done..is wrong.
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13 Feb 2006, 22:16
C,

whether over if ...down to C D E.

with since you need present perfect so has been is fine in C.

also C explain that "first sketched the figure in black" was a practice
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13 Feb 2006, 22:23
C is correct, and I see why. THanks for your replies!
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14 Feb 2006, 11:04
Why shouldn't it be "had been altered".........? Is it because the historians are currently using the process?
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14 Feb 2006, 14:22
When you have a 'since' in the sentence, that usually means that some action started in the past and is still continuing and this advocates the use of a present perfect tense like 'has been'. So should be 'C' in this case.
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14 Feb 2006, 18:49
BARIDDLA wrote:
Why shouldn't it be "had been altered".........? Is it because the historians are currently using the process?

with "since" comes "has/have" not "had". but if you focus on E, the phrase "a practice done" is not better than "a practice emplyoed" in B and C.
A/B are not correct cuz need "whether". in D, the phrase is not correct.
So C is best...
Re: just one question........   [#permalink] 14 Feb 2006, 18:49
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