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Ozone

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Manager
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Joined: 21 Feb 2009
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Ozone  [#permalink]

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New post 21 Jul 2009, 02:28
00:00
A
B
C
D
E

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(N/A)

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Manager
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Re: Ozone  [#permalink]

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New post 21 Jul 2009, 05:45
Ans looks like D.What is the OA?
Director
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Name: Ronak Amin
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Re: Ozone  [#permalink]

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New post 21 Jul 2009, 06:56
Between D and E > Usage of "had appeared".
We cannot use "has appeared" because this means that even now it is appearing that ozone is immune, however second part clearly says that now the view has changed.

E > "it" is ambiguous.
So D. OA?
Director
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Re: Ozone  [#permalink]

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New post 21 Jul 2009, 13:47
Economist wrote:
Between D and E > Usage of "had appeared".
We cannot use "has appeared" because this means that even now it is appearing that ozone is immune, however second part clearly says that now the view has changed.

E > "it" is ambiguous.
So D. OA?


How is that possible two are independent clauses separated by ';', so how you will justify the past perfect usage by using the event of other independent clause?

please enlighten me!!!
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Re: Ozone  [#permalink]

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New post 21 Jul 2009, 14:05
It says that "we have NOW realized...", so 1st clause must be in the past: had. In E "it" is ambigous, so I definitely vote for D!

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Re: Ozone  [#permalink]

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New post 21 Jul 2009, 16:12
so the sentence says:

Ozone...reaches high concentrations 12 miles above earth, where it ....; we now think otherwise.

because of the now usage, so what it appeared to be need to be used with had appeared...

so D?

--== Message from GMAT Club Team ==--

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Re: Ozone &nbs [#permalink] 21 Jul 2009, 16:12
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