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

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29 Apr 2006, 13:37
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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.

A
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
Ewhether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

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29 Apr 2006, 14:27
cindyn wrote:
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.

A
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
Ewhether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

I am tempted to go with C. 'Whether' is used when there are alternatives given. 'If' is used for hypothetical situations.
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29 Apr 2006, 14:34
shampoo wrote:
cindyn wrote:
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.

A
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
Ewhether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

I am tempted to go with C. 'Whether' is used when there are alternatives given. 'If' is used for hypothetical situations.

Hmm...you have a point there.....
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29 Apr 2006, 14:35
Should be C

Not only is the use of 'whether' is correct here, but more importantly, the usage of 'has been' completes the sentence.

'has been' indicates that there are changes and ongoing changes to the painting due to external factors and that is why 'infrared scannings' are used. But 'had been' indicates that the changes happend and done with.
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29 Apr 2006, 14:51
TeHCM wrote:
Should be C

Not only is the use of 'whether' is correct here, but more importantly, the usage of 'has been' completes the sentence.

'has been' indicates that there are changes and ongoing changes to the painting due to external factors and that is why 'infrared scannings' are used. But 'had been' indicates that the changes happend and done with.

I agree. In D "as was done" funnily suggests that other artists of the time aslo painted Mona Lisa! I am sure Leonardo da Vinci would have sued the other artists for patent infringement
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29 Apr 2006, 18:56
OA is C
Thanks for the explanations
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29 Apr 2006, 21:30
cindyn wrote:
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.

A
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
Ewhether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

Cit should be
We need to use whether in this case. If needs to be used when we have then in the statement.
And the statement should be in "Present Perfect" tense.
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29 Apr 2006, 21:31
cindyn wrote:
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.

A
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
Ewhether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

Cit should be
We need to use whether in this case. If needs to be used when we have then in the statement.
And the statement should be in "Present Perfect" tense.
Re: SC: Art Historians   [#permalink] 29 Apr 2006, 21:31
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