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# Geologists once thought that the molten rock known as lava

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Manager
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Geologists once thought that the molten rock known as lava [#permalink]

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14 Oct 2009, 06:42
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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.

A. was an underground remnant of Earth's earliest days, sporadically erupting
B. had been an underground remnant of Earth's earliest days and sporadically erupted
C. was an underground remnant of Earth's earliest days, which sporadically erupted
D. would be an underground remnant of Earth's earliest days that sporadically erupted
E. was an underground remnant of Earth's earliest days, having sporadically erupted
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Re: Wed Q1 - Lava [#permalink]

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14 Oct 2009, 10:37
A for me, continuous tense is required
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Re: Wed Q1 - Lava [#permalink]

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14 Oct 2009, 11:32
C, D, E seem wrong.

IMO B.

i am thinking "had been an underground remnant of Earth's earliest days" and "sporadically erupted " should be in past tense because, last clause talk of present tense "they now know"

What's the OA hogann ?
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Last edited by srini123 on 14 Oct 2009, 17:34, edited 1 time in total.
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Re: Wed Q1 - Lava [#permalink]

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14 Oct 2009, 11:46
one more for A. continuous tense is required.
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Re: Wed Q1 - Lava [#permalink]

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14 Oct 2009, 14:53
Agreed, [A]. Need the "ing" form of the verb to modify the entire preceding clause.
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Re: Wed Q1 - Lava [#permalink]

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15 Oct 2009, 08:21
OA is A

Tense remains the same and sporadically erupting correctly modifies "an underground remnant.."
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Re: Wed Q1 - Lava [#permalink]

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15 Oct 2009, 11:22
thanks hogann , i missed the boat
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Re: Wed Q1 - Lava   [#permalink] 15 Oct 2009, 11:22
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# Geologists once thought that the molten rock known as lava

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