Before scientists learned how to make a synthetic growth : GMAT Sentence Correction (SC)
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# Before scientists learned how to make a synthetic growth

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Before scientists learned how to make a synthetic growth [#permalink]

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26 Jan 2008, 08:58
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Before scientists learned how to make a synthetic growth hormone, removing it painstakingly in small amounts from the pituitary glands of human cadavers.

a) scientists learned how to make a synthetic growth hormone, removing it painstakingly

b) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly.

c) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed

d) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly

e) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists

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SVP
Joined: 21 Jul 2006
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Kudos [?]: 754 [0], given: 1

Re: SC: Scientists [#permalink]

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26 Jan 2008, 09:40
OA is C. But I chose D because "scientists" was correctly placed right after the modifier. It is perfectly describing "scientists", but something else must be wrong with D that we haven't realised yet.
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Re: SC: Scientists [#permalink]

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26 Jan 2008, 09:48
I think D sounds good.

a) scientists learned how to make a synthetic growth hormone, removing it painstakingly
: Unclear. Who remove it?

b) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly.
: No conjunction between 2 sentences.

c) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed
: Same problem as B. No conjunction.

d) learning how to make a synthetic growth hormone, scientists had to remove it painstakingly

e) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists
: Wrong referent. "It" cant learn.
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Re: SC: Scientists [#permalink]

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26 Jan 2008, 19:35
This sentence has past perfect tense issue:

a) scientists learned how to make a synthetic growth hormone, removing it painstakingly (“removing” is working as modifier buy required a verb - eliminate it)

b) scientists had learned about making a synthetic growth hormone, they had to remove it painstakingly. (Sentence has past perfect issue – one needs to be in a simple past – eliminate it)

c) scientists learned how to synthesize the growth hormone, it had to be painstakingly removed (This is correctly defining the past perfect – hold it)

d) learning how to make a synthetic growth hormone , scientists had to remove it painstakingly (why learning – eliminate it)

e) learning how to synthesize the growth hormone, it had to be painstakingly removed by scientists (why learning – eliminate it)

Re: SC: Scientists   [#permalink] 26 Jan 2008, 19:35
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# Before scientists learned how to make a synthetic growth

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