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The peaks of a mountain range, acting like rocks in a

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The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 09:31
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

44% (02:07) correct 56% (01:01) wrong based on 16 sessions
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over
them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms
them is moving rapidly, are
known as "standing waves."

A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are

(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is

(D) stationary crests and troughs although they are formed by rapidly moving air, is

(E) stationary crests and troughs although the air that forms them is moving rapidly, are
[Reveal] Spoiler: OA

Last edited by Gnpth on 07 Oct 2014, 02:28, edited 1 time in total.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 09:48
D makes more sense, but I see that I am wrong !!!!! :roll: Give us all 5 choice.

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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 19:49
Here you go. I have extracted this question from OG10.

A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are
(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are

(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is
(D) stationary crests and troughs although they are formed by rapidly moving air, is

(E) stationary crests and troughs although the air that forms them is moving rapidly, are

I can't tell between C&D, why one is preferred to the other. Can anyone help out?
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 20:26
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You forgot, "... is moving rapidly" on your original post.

In my opinion, C is right because of the meaning of crests and troughs themselves.

Crest means the highest part of a hill or mountain range.

So it's probably expected to be stationary to begin with.

Air forms troughs but not crest.

So it is with Crest alone and troughs that blah blah blah.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 20:34
See the comparisons here,

C: crests and troughs that remain stationary but the air that forms them is moving.

Them refers to crests and troughs.


D: stationary crests and troughs but they are formed by rapidly moving air.

Second part of the sentence talks about the motion,but not the first part.

Hence C prevails.
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 22 Oct 2010, 20:53
fairy1981 wrote:
Here you go. I have extracted this question from OG10.

The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over
them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms
them is moving rapidly, are known as "standing waves."

A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are
(B) crests and troughs that remain stationary although they are formed by rapidly moving air, are
(C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is
(D) stationary crests and troughs although they are formed by rapidly moving air, is
(E) stationary crests and troughs although the air that forms them is moving rapidly, are

I can't tell between C&D, why one is preferred to the other. Can anyone help out?


Things to look out for are -

1) the resulting flow pattern, ..blah blah.. IS known as ( Eliminating A,B,E)
2) B/W C and D,
C the air that forms them (crest and trough) is moving rapidly - ACTIVE Form to express an action
D they (crest and trough) are formed by rapidly moving air - PASSIVE Form to express an action.


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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 23 Oct 2010, 20:10
Thanks guys. Is this question considered above 700 category?
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 23 Oct 2010, 21:15
Expert's post
IMO can not be ; if you can strike down three choices in one stroke i.e. subject –verb disagreement, then, it can not go beyond 600
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Re: The peaks of a mountain range, acting like rocks in a [#permalink] New post 24 Oct 2010, 21:11
fairy1981 wrote:
The peaks of a mountain range, acting like rocks in a streambed, produce ripples in the air flowing over
them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms
them is moving rapidly, are
known as "standing waves."

(c) with crests and troughs that remain stationary although the air that forms them, is

(d) with stationary crests and troughs although they are formed by rapidly moving air, is

Which one is the better choice? (I've written down only 2 choices because the other two do not make sense)


D-with stationary crests and troughs although they are formed by rapidly moving air, is

The bolded part is not a clause. You can not use although with the phrase.
check http://www.englishclub.com/grammar/conj ... nating.htm

In c - crests and troughs that remain stationary although the air that forms them is moving rapidly, is

both the bolded parts are clauses. Hence the use of although is justified.

Also in D.- 'rapidly moving air' changes the meaning.
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Re: The peaks of a mountain range, acting like rocks in a   [#permalink] 24 Oct 2010, 21:11
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