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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 06 Jan 2008, 07:22
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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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Re: sc-economic/economical [#permalink] New post 06 Jan 2008, 08:16
marcodonzelli 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


D

economical is used in sense of cheaper hence BCE ruled out. In A, E "have to know a great deal more than now" is not clear similar comparison in D is clearer. Hence D is the best
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Re: sc-economic/economical [#permalink] New post 06 Jan 2008, 08:21
klepto wrote:
marcodonzelli 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


D

economical is used in sense of cheaper hence BCE ruled out. In A, E "have to know a great deal more than now" is not clear similar comparison in D is clearer. Hence D is the best


I thought D as well....OA is E actually
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Re: sc-economic/economical [#permalink] New post 06 Jan 2008, 08:26
.........oops
:?: any logic which goes with this one
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Re: sc-economic/economical [#permalink] New post 06 Jan 2008, 08:39
klepto wrote:
.........oops
:?: any logic which goes with this one



let's find it...i don't have explanations...
Re: sc-economic/economical   [#permalink] 06 Jan 2008, 08:39
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