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# By sucking sap from the young twigs of the hemlock tree,

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Manager
Joined: 08 Apr 2004
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By sucking sap from the young twigs of the hemlock tree, [#permalink]

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26 Aug 2004, 03:44
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By sucking sap from the young twigs of the hemlock tree, <<tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop>> prematurely.

A. tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop
B. tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping
C. the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping
D. the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop
E. the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping
[Reveal] Spoiler: OA
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Joined: 27 Jul 2004
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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26 Aug 2004, 07:40
I think the answer is D.

Tree growth can't "suck", so A and B are wrong. "Which" in C and "this" in E can't indicate the sentence before them.
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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26 Aug 2004, 08:15
First I went for C but D makes perfect sense to me. causing needle to change color and to drop prematurely
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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26 Aug 2004, 08:46
D is best. A and B have misplaced modifiers problem. C and E improperly introduce conjuntion "and" after the commas at end of sentence
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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08 Dec 2011, 04:54
pls, help

the word "this" in E is right or wrong. Pls, explain.
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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08 Dec 2011, 08:27
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thangvietnam wrote:
pls, help

the word "this" in E is right or wrong. Pls, explain.

"this" in choice E is totally wrong, this does not refer to anything. If you use "this action (of the woolly adelgid), it will be ok.

Furthermore, choice E make parallelism in the modifier-part with 2 ambiguous items "this" vs "the their dropping".
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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08 Dec 2011, 09:33
+1 D
A & B modifier prob
C Which...wrongly modifies the previous noun
E error in maintining II-ism
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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12 Dec 2011, 04:50
By sucking sap from the young twigs of the hemlock tree, <<tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop>> prematurely.

A. tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop
B. tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping
wrong ....

C. the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping (and dropping is not parallel to any part of the sentence)
D. the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop
E. the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping
(( their refers to what? ))
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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13 Dec 2011, 04:11
A and D stands out,

i would go for D for active construction.

-- is there any thing wrong with A, other than the passive construction?
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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13 Dec 2011, 07:14
A and in fact B are most certainly grammatically wrong becos they belong to the classic case of misplaced modification.The participial modifier By sucking sap from the young twigs of the hemlock tree should be followed by the modified noun namely the woolly adelgid rather than the tree growth. A and B mean as if the tree growth is sucking sap.
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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13 Dec 2011, 13:01
marine wrote:
By sucking sap from the young twigs of the hemlock tree, <<tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop>> prematurely.

A. tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop
B. tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping
C. the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping
D. the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop
E. the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping

Narrow down to C/D/E
Discard C as tree growth can't cause the change of color
Discard E growth, and.. green,and... their dropping?....
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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05 Jan 2012, 22:39
Modifier is wrongly placed in A and B. E is wordy. D has to change .... to drop ||ism. D
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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06 Sep 2015, 06:00
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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13 Apr 2016, 20:08
Can we eliminate E on the grounds that 'their dropping' is awkward
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Re: By sucking sap from the young twigs of the hemlock tree, [#permalink]

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16 Apr 2016, 13:34
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Expert's post
knuckleduster wrote:
Can we eliminate E on the grounds that 'their dropping' is awkward

In general a possessive noun / pronoun + gerund is perfectly valid combination.

The following link will probably be helpful to get a better concept on this topic:

http://www.english-for-students.com/Pos ... runds.html
Re: By sucking sap from the young twigs of the hemlock tree,   [#permalink] 16 Apr 2016, 13:34
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# By sucking sap from the young twigs of the hemlock tree,

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