RSYD wrote:
Hi
GMATNinja , I have literally spent the whole day reading this thread to find my answer but I have not found one that solves my problems.
As a result I am really frustrated right now and i am begging for you help
My FIRST problem is :
As you said, in B, we're comparing the "The cost of running nuclear power plants" and "the cost for running for other types of power plants."
we could see that "for" replaces " of running" in the second part of parallelism here, and you said that the change in prepositions makes sense here.
BUT the parallelism in D-which is wrong as you all said- changes prepositions as well ! I could not understand why the the change in prepositions makes sense in B but doesn't in D!
D: It costs about the same to run nuclear plants as for other types of power plants
Isn't "for" replace "to run" in D just as it replaces " of running" in B ?
I know that there are other problems in D for us to eliminate it but i just want to figure out the parallelism here.
My SECOND problem is :
An expert in this thread think that "for" is just a
connection to connect "that"-which is a replacement for "of running"-and "other types of power plants."
But in your post, you said for is a substitute instead of a connection after "of running"
I think your interpretation is kind of contrary to his and I really don't know which interpretation I should take.
Could you please explain that ?
Thanks in advance !!!!!
Looking forward to your reply!
Sorry to hear that this ruined your day! That's unfortunate because you've actually done your job wonderfully here:
Quote:
I know that there are other problems in D for us to eliminate it.
That's all you have to do! It sounds like you are trying to use these questions and explanations to come up with specific and concrete rules that you can apply to other questions, and that's just not how the GMAT works -- it's about comparing your options and picking the best one.
Are there any black-and-white rules prescribing EXACTLY how you should fill in the blanks in (B)? No. But the comparison seems logical enough, so we would leave (B) in the running. (D) has other issues, so we can eliminate it without worrying about whether the comparison is strictly "correct" or "incorrect" -- again, the GMAT isn't about memorizing a list of "correct" and "incorrect" grammatical structures.
That said, the choice of prepositions in (D) does seem worse than the choice of prepositions in (B):
- "It costs $1,000 to run a nuclear plant." - No problem.
- "It costs $1,000 for running a nuclear plant." - This doesn't work as well. We want "it costs $X to do something".
Also, notice that we needed to use "running" in the second example. So in order for (D) to work, we have to assume that there's an implied "running" after the "for" even though "running" doesn't appear earlier in the comparison ("It costs about the same
to run nuclear plants as [it costs] for [
running] other types of power plants..."). Is that a concrete error? Probably not, but it certainly makes the meaning harder to follow, since the reader has more work to do to make sense of it.
Does (D) violate some concrete comparison or parallelism rules? Probably not, but the comparison is
better in (B), as discussed in
our original explanation.
Sorry for the not-so-satisfying response. But if you've eliminated the incorrect choices and picked the right one, you've done your job! Pat yourself on the back and move on.
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