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Geologists once thought that the molten rock known as lava

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ArvGMAT
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Geologists once thought that the molten rock known as lava [#permalink] New post   27 Jun 2007, 21:35
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Geologists once thought that the molten rock known as lava was an underground remnant of Earth's earliest days, sporadically erupting through volcanoes, but they now know that it is continuously created by the heat of the radioactivity deep inside the planet.
1. was an underground remnant of Earth's earliest days, sporadically erupting
2. had been an underground remnant of Earth's earliest days and sporadically erupted
3. was an underground remnant of Earth's earliest days, which sporadically erupted
4. would be an underground remnant of Earth's earliest days that sporadically erupted
5. was an underground remnant of Earth's earliest days, having sporadically erupted



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Re: Geologists once thought that the molten rock known as lava [#permalink] New post   27 Jun 2007, 22:29
Confused between the use of Would and Was here ?? Explanations please.
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Re: Geologists once thought that the molten rock known as lava [#permalink] New post   27 Jun 2007, 22:31
A for correct switch from Simple past to present.
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Re: Geologists once thought that the molten rock known as lava [#permalink] New post   27 Jun 2007, 22:56
ArvGMAT wrote:
Geologists once thought that the molten rock known as lava was an underground remnant of Earth's earliest days, sporadically erupting through volcanoes, but they now know that it is continuously created by the heat of the radioactivity deep inside the planet.
1. was an underground remnant of Earth's earliest days, sporadically erupting
2. had been an underground remnant of Earth's earliest days and sporadically erupted
3. was an underground remnant of Earth's earliest days, which sporadically erupted
4. would be an underground remnant of Earth's earliest days that sporadically erupted
5. was an underground remnant of Earth's earliest days, having sporadically erupted


'was' required for logical switch between simple past and present tense.

1,3,5 - left

3 - 'which' points earths earliest days - out

1, 5 - hard choice.

Selected 1.

But, what is wrong with 5??
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Re: Geologists once thought that the molten rock known as lava [#permalink] New post   28 Jun 2007, 04:07
syamee_u wrote:
ArvGMAT wrote:
Geologists once thought that the molten rock known as lava was an underground remnant of Earth's earliest days, sporadically erupting through volcanoes, but they now know that it is continuously created by the heat of the radioactivity deep inside the planet.
1. was an underground remnant of Earth's earliest days, sporadically erupting
2. had been an underground remnant of Earth's earliest days and sporadically erupted
3. was an underground remnant of Earth's earliest days, which sporadically erupted
4. would be an underground remnant of Earth's earliest days that sporadically erupted
5. was an underground remnant of Earth's earliest days, having sporadically erupted


'was' required for logical switch between simple past and present tense.

1,3,5 - left

3 - 'which' points earths earliest days - out

1, 5 - hard choice.

Selected 1.

But, what is wrong with 5??


1 for me too.
5 says " having sporadically erupted" which is past tense while we require present.
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Re: Geologists once thought that the molten rock known as lava [#permalink] New post   10 Aug 2010, 07:52
mgmat-700-level-sc-66657.html?hilit=geologist#p496641

OA is A .. key point is Adverbual modifier can be placed anywhere in the sentence and should not necesarily touch the noun ...
I marked A by POE....



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This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Sentence Correction (EA only) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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Re: Geologists once thought that the molten rock known as lava [#permalink]
10 Aug 2010, 07:52
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