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To develop more accurate population forecasts, demographers

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To develop more accurate population forecasts, demographers [#permalink] New post 20 Nov 2007, 12:29
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A
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E

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To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A. have to know a great deal more than now about the social and economic
B. have to know a great deal more than they do now about the social and economical
C. would have to know a great deal more than they do now about the social and economical
D. would have to know a great deal more than they do now about the social and economic
E. would have to know a great deal more than now about the social and economical
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Last edited by gregspirited on 20 Nov 2007, 12:38, edited 1 time in total.
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Re: SC - Demographers [#permalink] New post 20 Nov 2007, 12:34
gregspirited wrote:
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

A. have to know a great deal more than now about the social and economic
B. have to know a great deal more than they do now about the social and economical
C. would have to know a great deal more than they do now about the social and economical
D. would have to know a great deal more than they do now about the social and economic
E. would have to know a great deal more than now about the social and economical


B. prediction and comparision.

CDE have "would" that doesnot help express an idea with certainty.
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 [#permalink] New post 21 Nov 2007, 06:35
IMO (D). I think 'economic' is better suited here. 'economical' determinants means determinants are economical. A and E are surely out of contention. B and C use 'economical'.
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 [#permalink] New post 21 Nov 2007, 09:24
eyunni wrote:
IMO (D). I think 'economic' is better suited here. 'economical' determinants means determinants are economical. A and E are surely out of contention. B and C use 'economical'.


I agree with eyunni and Beyond.

Something is economical if it saves you money;
but if you’re talking about the effect of some measure on the world’s economy, it’s an economic effect.

B - is out ( if it were economic.. then I would have chosen B)

I pick D.

What is OA?
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 [#permalink] New post 21 Nov 2007, 09:28
D. It's clear and concise.

can't be b,c , or e b/c economical is not the proper adj to use in this case. its economic. e.g. economic factors not economical factors
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 [#permalink] New post 21 Nov 2007, 10:21
Whats the OA?

I am not convinced with D ; Why should we use would have?
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 [#permalink] New post 21 Nov 2007, 10:34
OA is E. I still don't understand why E is right
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 [#permalink] New post 21 Nov 2007, 11:53
gregspirited wrote:
OA is E. I still don't understand why E is right


Where is this question from? Is it part of the 1000 SC questions?
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 [#permalink] New post 21 Nov 2007, 18:22
gregspirited wrote:
OA is E. I still don't understand why E is right


It is possible. It is more on the usage of Infinitives as subject. I am trying to get more info on that.

From what I understand they are more used for firm and deinite tones but it seems they also can be used for conditional or prediction.
  [#permalink] 21 Nov 2007, 18:22
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