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Tektites

by fighting_cax » Mon Jan 12, 2009 3:46 pm
Tektites, which may have been propelled to Earth from lunar volcanoes, are much like the volcanic glass obsidian, but their chemical composition is different than any terrestrial lava; they contain far less water than obsidian does and none of its characteristic microcrystals.
(A) is different than any terrestrial lava; they contain
(B) is different than any terrestrial lava’s, containing
(C) is different from that of any terrestrial lava; they contain
(D) differs from any terrestrial lava in containing
(E) differs from that of any terrestrial lava’s, containing

OA is C

Please explain.
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by welcome » Mon Jan 12, 2009 4:27 pm
A) Wrong comparision "chemical composition" with "terrestrial lava"
B) Participal not required here, "containing"
C) CORRECT
D)Wrong comparision "chemical composition" with "terrestrial lava"
E) Wrong construction "of any terrestrial lava’s", either OF or 'S is required.
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by ronniecoleman » Tue Jan 13, 2009 6:41 am
IMO C


different from
differ from correct idiom

s different from that of any terrestrial lava; they contain

Correct

(D) differs from any terrestrial lava in containing
awkward
(E) differs from that of any terrestrial lava’s, containing

that of --- lava's redundant use
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