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Ozone, a special form of oxygen that screens out harmful

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Re: Ozone, a special form of oxygen that screens out harmful [#permalink] New post 13 Apr 2013, 09:00
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A
B
C
D
E

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  35% (medium)

Question Stats:

57% (01:56) correct 43% (02:02) wrong based on 152 sessions
rakeshd347 wrote:
Ozone, a special form of oxygen that screens out harmful ultraviolet rays, reaches high concentrations twelve miles above Earth, where it has long appeared that it was immune from human influence; we have now realized, though, that emissions of industrial chlorofluorocarbons deplete the ozone layer.

(A) has long appeared that it was immune from
(B) has long appeared to have been immune from
(C) has long appeared as being immune to
(D) had long appeared immune to
(E) had long appeared that it was immune to

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From is wrong. So A and B out

in C being is ackward and in E we have two IT - convoluted

D is straight
[Reveal] Spoiler: OA

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Re: Ozone, a special form of oxygen that screens out harmful [#permalink] New post 10 Oct 2014, 11:17
Hello from the GMAT Club VerbalBot!

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Re: Ozone, a special form of oxygen that screens out harmful [#permalink] New post 09 Jan 2015, 02:10
Ozone reaches high concentrations twelve miles above Earth, where
it has long appeared that it was immune from human influence;
we have now realized, though, that emissions of industrial chlorofluorocarbons deplete the ozone layer.

Immune to: insusceptible (to) or secure (against): immune to inflation.
Immune from: immune from exempt from, free from
Correct use of immune here is "to".
A/B out.

E is out for obvious reason.

Can someone plz explain D.
What I have read in the forums is that past perfect takes simple past with it.And it seems to be is some sort of rule.
e.g. By the time I reached there, he had finished the class.

(A) has long appeared that it was immune from
(B) has long appeared to have been immune from
(C) has long appeared as being immune to
(D) had long appeared immune to
(E) had long appeared that it was immune to
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Ozone, a special form of oxygen that screens out harmful [#permalink] New post 09 Jan 2015, 02:44
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Your reflection is correct, totally. However, this is a great example of a gmatprep question in which the rules divert a bit from an accepted standard i.e. past perfect plus simple past.

According to that rule we do not have a correct answer and this is impossible.

As such , the key thing here is to learn how this exam NEEDS a flexible and resilience strategy to approach.

C and D are our answers, no matter what, based on idiom - first strategy we could use.

But C can be eliminated because the use of being (most of the time is wrong on the gmat and it is used correct in an underlined sentece at the beginning of the same) also because the use of being here conveys a sense that the ozone is immune per se and not from CFC.

Sometimes the best answer is NOT the best in an absolute sense in terms of grammar style or construction, though is correct and communicates the best meaning we could have in that moment.

Pick D and move on. That's it

Hope this helps
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Ozone, a special form of oxygen that screens out harmful   [#permalink] 09 Jan 2015, 02:44
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