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SC: Kaplan Adv - #25 Kap Adv pg 156

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saumster
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SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   25 Aug 2006, 20:21
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A
B
C
D
E

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Anyone know the answer to this and can explain: I will post right answer after giving you guys a shot
----------------------------------------
Scientists are currently trying to determine the extent to which tectonic plates have been shifted from their previous positions by earthquakes and other similar phenomena

a. to which tectonic plates have been shifted
b. to which tectonic plates have shifted
c. of the shift of tectonic plates
d. of tectonic plates shifting
e. that tectonic plates have been shifted



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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   25 Aug 2006, 22:54
idiom - extent to

have been is the right tense.

so going with A.
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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   26 Aug 2006, 00:26
Could somebody explain, why not B ... the shifting took place at an indefinite time in the past ... isn't "have" bettter placed than "have been" here???
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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   26 Aug 2006, 01:27
hisharma wrote:
Could somebody explain, why not B ... the shifting took place at an indefinite time in the past ... isn't "have" bettter placed than "have been" here???

A

A. Scientists are currently trying to determine the extent to which tectonic plates have been shifted from their previous positions by earthquakes and other similar phenomena.

B. Scientists are currently trying to determine the extent to which tectonic plates have shifted from their previous positions by earthquakes and other similar phenomena.

Remove the bold part and then see what makes sense. A is in passive voice and we need have been.
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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   26 Aug 2006, 01:55
gr8 explanation ... very direct indeed .. thanks ps_dahiya ..yup A looks fine ..
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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink] New post   26 Aug 2006, 09:08
Yes A it was.

Here's my confusion:
1. basics teach you to try and make a sentence as active as possible rather tahn leave it in passive
2. they also say try and be as concise as possible.

This seems contradictory to A. I went with B. I know "extent to..." is correct but don't we use it as:
'the extent of your rudeness is unbeleivable' as also
'the extent to which you are rude is unbelievable'
.
.
.Any comments please?



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Re: SC: Kaplan Adv - #25 Kap Adv pg 156 [#permalink]
26 Aug 2006, 09:08
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