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To develop more accurate population forecasts, demographers

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Senior Manager
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To develop more accurate population forecasts, demographers [#permalink] New post 30 Apr 2009, 12:58
00:00
A
B
C
D
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

please explain answers
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Re: SC - demographers [#permalink] New post 30 Apr 2009, 18:40
bigtreezl wrote:
neeshpal 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 [color=#FF0000] [/color]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

please explain answers


D


Excellent, thank you!

I got B at first, but then noticed economical.
D it is, no doubt.
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Re: SC - demographers [#permalink] New post 02 May 2009, 10:03
A and D are not parallel. E has distorted meaning.
B is rejected because of absence of would.
IMO C
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Re: SC - demographers [#permalink] New post 02 May 2009, 10:05
Oh my mistake...economical is not parallel. So D is the correct ans..
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Re: SC - demographers   [#permalink] 02 May 2009, 10:05
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