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past and past perfect

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past and past perfect

by tanviet » Sun May 24, 2009 9:04 pm
//Five hundred million different species of living creatures have appeared on Earth, nearly 99percent of them vanishing.//


a,

b, Nearly 99percent of five hundred million different species of living creatures that appeared on Earth have vanished

c, Vanished are nearly 99percent of the five hundred million different species of living creatures that appeared on Earth.

d, Of five hundred million defferent species of living creatures that have appeared on Earth, nearly 99percent of them have vanished

e, Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99percent have vanished
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by rameshthammanna » Sun May 24, 2009 10:02 pm
Is (e) the answer?
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by rookiez » Mon May 25, 2009 4:58 am
One between D & E??

What is the OA and Source?
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by Domnu » Mon May 25, 2009 7:00 am
I would go with E. Here's why:

[spoiler](A) - not a complete sentence
(B) - 99% of __ of ___ ? Too many of's
(C) - Not the best way.
(D) - Missing 'the' between Of and the next part of the sentence.
(E) - This is correct.[/spoiler]

OA?
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by marshmallow » Mon May 25, 2009 7:03 am
I assume the answer would be E?
Coz I think D omit a "the" before "five million". This should be an important mistake."
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by vaishalijain7 » Mon May 25, 2009 1:09 pm
IMO 'B'. There are two events discussed, first is 'appeared' and the second is 'vanished'. 'Appeared' happened first and 'vanished' next so first event should be in simple past and next one in present perfect.

What is OA?
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by mehravikas » Mon May 25, 2009 7:17 pm
Confused between 'B' and 'E'..but I'll go with 'B' as it looks concise..
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by aman.kr.jha » Mon May 25, 2009 10:06 pm
B seems correct.
If nebody finds finds ne mistake in B. Plz correct me.
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by nervesofsteel » Mon May 25, 2009 10:43 pm
IMO E

d, Of five hundred million defferent species of living creatures that have appeared on Earth, nearly 99percent of them have vanished<- modifier usage... and the use of pronoun "them " is not required...

e, Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99percent have vanished<- Correct usage of modifier....
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by rahulg83 » Tue May 26, 2009 10:14 am
I'd have chosen B
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Re: past and past perfect

by The GMAT Chef » Tue May 26, 2009 2:51 pm
duongthang wrote://Five hundred million different species of living creatures have appeared on Earth, nearly 99percent of them vanishing.//


a,

b, Nearly 99percent of five hundred million different species of living creatures that appeared on Earth have vanished

c, Vanished are nearly 99percent of the five hundred million different species of living creatures that appeared on Earth.

d, Of five hundred million defferent species of living creatures that have appeared on Earth, nearly 99percent of them have vanished

e, Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99percent have vanished

marshmallow s right. (B) is incorrect mainly because of the omission of the definite article "the". Because of the presence of the relative pronoun that, the sentence needs a definite article.
You say: "I took 99% of the GMAT lessons..." but not "I took 99% of GMAT lessons..."
Answer (D) is redundant besides having the same mistake as (B) ; "of them" is not needed. :)
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by vaishalijain7 » Tue May 26, 2009 5:50 pm
Hi, I am a non native english speaker, Can anyone please tell me where could I find this rule "Because of the presence of the relative pronoun 'that', the sentence needs a definite article 'the' ". Is this somewhere mentioned in MGMAT SC guide?
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Relative Pronouns

by The GMAT Chef » Tue May 26, 2009 6:54 pm
vaishalijain7 wrote:Hi, I am a non native english speaker, Can anyone please tell me where could I find this rule "Because of the presence of the relative pronoun 'that', the sentence needs a definite article 'the' ". Is this somewhere mentioned in MGMAT SC guide?
Hi vaishalijain7

What I said is in the context of the sentence at hand. If you're identifying an object, a person, or an animal (not previously identified by name or otherwise) as it is the case in choice (B), you need to use the definite article. Of course, there are cases in which you can use "that" without the definite article.
This site may help you out in the use of relative pronouns:

https://esl.about.com/library/grammar/bl ... define.htm
:)
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by vaishalijain7 » Wed May 27, 2009 8:17 am
thanks The GMAT Chef for your response.

duongthang, can you please post the OA?
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