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There is substantial evidence that certain forms of solar

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There is substantial evidence that certain forms of solar [#permalink] New post 25 Dec 2006, 05:35
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There is substantial evidence that certain forms of solar energy either now or within a few years will be economically competitive
with conventional sources of heat and power.


a)
b) will either be economically competitive with conventional of heat and power within a few years or are so now.

c)will be eonomically competitive with conventional sources of heat and power either now or within a few years.

d) either are now economically competitive with conventional sources of heat and power or will be so within a few years.

e) either are now or will be within a few years economically competitive with conventional sources of heat and power.
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 [#permalink] New post 25 Dec 2006, 05:52
I will go with D. Adheres with tense best. either are now....or will be so.
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 [#permalink] New post 25 Dec 2006, 16:12
D looks ok...

What about C.. I think either now or within... now and within are different types ...
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 [#permalink] New post 25 Dec 2006, 22:55
khaos wrote:
may someone please explain why not C ?


X will be competitive NOW??? :no

X is/are competitive now... but WILL be in y years :yes
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 [#permalink] New post 26 Dec 2006, 00:32
khaos wrote:
may someone please explain why not C ?

Agree with U2..
Also Either/Or should follow a pattern :
…either + noun ..or + noun..
…either + verb ..or + verb..
…either + adjective ..or + adjective...
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 [#permalink] New post 26 Dec 2006, 20:03
Thanks u2lover and AK, it looks obvious now. :)
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 [#permalink] New post 19 Jan 2007, 03:35
AK wrote:
khaos wrote:
may someone please explain why not C ?

Agree with U2..
Also Either/Or should follow a pattern :
…either + noun ..or + noun..
…either + verb ..or + verb..
…either + adjective ..or + adjective...


C for me.

Idiom: "either x or y". In the case of E, it is unclear what is 'x'.
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 [#permalink] New post 22 Jan 2007, 15:00
I choose D.

I was originally leaning towards C as well but the sentence seems to say tha the forms of solar energy will be economically competitive now or in a few years. The "will be" in the sentence tells me that the forms of solar energy are not yet economically competitive.

D works for me because it states that forms of solar energy are either (a) already economically competitive or (b) will be in a few years.
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 [#permalink] New post 22 Jan 2007, 15:18
D for me,

Thanks U2Lover for the explanation between C and D, I was stuck between the two.
  [#permalink] 22 Jan 2007, 15:18
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