Sentence Correction

ayushiiitm wrote:His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in what are now temperate areas

(A) in which great ice sheets had existed in what are now temperate areas
(B) in which great ice sheets existed in what are now temperate areas
(C) when great ice sheets existed where there were areas now temperate
(D) when great ice sheets had existed in current temperate areas
(E) when great ice sheets existed in areas now that are temperate

i chose D

but explanation says past perfect should not be used. Instead existed should be used

Also 'when' should be used, since time is being considered.

OA later

Another confusion i have is regarding His

His is a possessive pronoun, like 'those'. Can the possessive pronoun be used before the referent. I had read somewhere that possessive pronoun should always come after the referent has already been stated

gmat_perfect wrote:

ayushiiitm wrote:His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in what are now temperate areas

(A) in which great ice sheets had existed in what are now temperate areas
(B) in which great ice sheets existed in what are now temperate areas
(C) when great ice sheets existed where there were areas now temperate
(D) when great ice sheets had existed in current temperate areas
(E) when great ice sheets existed in areas now that are temperate

i chose D

but explanation says past perfect should not be used. Instead existed should be used

Also 'when' should be used, since time is being considered.



OA later

Another confusion i have is regarding His

His is a possessive pronoun, like 'those'. Can the possessive pronoun be used before the referent. I had read somewhere that possessive pronoun should always come after the referent has already been stated

Answer:

1. If there are two related past events, we should use the past perfect tense for the more past one.

=> There is only one event. So, we should ignore the use of past perfect.

Eliminate the options A and D.
2. There are/there were' is very often treated as redundant in GMAT land.

=> Eliminate the option C.

3.Adverb modifies the verb. So, adverb should be used very near to the verb.

=> Now that are is awkward and misleading.
Eliminate E.

Answer is B

paes wrote:

gmat_perfect wrote:

ayushiiitm wrote:His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in what are now temperate areas

(A) in which great ice sheets had existed in what are now temperate areas
(B) in which great ice sheets existed in what are now temperate areas
(C) when great ice sheets existed where there were areas now temperate
(D) when great ice sheets had existed in current temperate areas
(E) when great ice sheets existed in areas now that are temperate

i chose D

but explanation says past perfect should not be used. Instead existed should be used

Also 'when' should be used, since time is being considered.



OA later

Another confusion i have is regarding His

His is a possessive pronoun, like 'those'. Can the possessive pronoun be used before the referent. I had read somewhere that possessive pronoun should always come after the referent has already been stated

Answer:

1. If there are two related past events, we should use the past perfect tense for the more past one.

=> There is only one event. So, we should ignore the use of past perfect.

Eliminate the options A and D.
2. There are/there were' is very often treated as redundant in GMAT land.

=> Eliminate the option C.

3.Adverb modifies the verb. So, adverb should be used very near to the verb.

=> Now that are is awkward and misleading.
Eliminate E.

Answer is B

IMO : B

why E is wrong : not convinced with your logic
I think E is wrong because moderate is an adjective, so it should come with areas.

If there is some other good, straight reason to avoid E, please explain.

paes wrote:

gmat_perfect wrote:

ayushiiitm wrote:His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in what are now temperate areas

(A) in which great ice sheets had existed in what are now temperate areas
(B) in which great ice sheets existed in what are now temperate areas
(C) when great ice sheets existed where there were areas now temperate
(D) when great ice sheets had existed in current temperate areas
(E) when great ice sheets existed in areas now that are temperate

i chose D

but explanation says past perfect should not be used. Instead existed should be used

Also 'when' should be used, since time is being considered.



OA later

Another confusion i have is regarding His

His is a possessive pronoun, like 'those'. Can the possessive pronoun be used before the referent. I had read somewhere that possessive pronoun should always come after the referent has already been stated

Answer:

1. If there are two related past events, we should use the past perfect tense for the more past one.

=> There is only one event. So, we should ignore the use of past perfect.

Eliminate the options A and D.
2. There are/there were' is very often treated as redundant in GMAT land.

=> Eliminate the option C.

3.Adverb modifies the verb. So, adverb should be used very near to the verb.

=> Now that are is awkward and misleading.
Eliminate E.

Answer is B

IMO : B

why E is wrong : not convinced with your logic
I think E is wrong because moderate is an adjective, so it should come with areas.

If there is some other good, straight reason to avoid E, please explain.