tough cr from princeton (Astronomers/dust)

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tj123: Senior | Next Rank: 100 Posts; Posts: 85; Joined: Mon Dec 08, 2008 12:09 am

by tj123 » Wed Apr 15, 2009 9:12 pm

attached.

how do you know that persisted is wrong.
i assume that created and persisted are the verbs that refer back to particles.

persisting doesnt seem to make sense.

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Source: Beat The GMAT — Sentence Correction | Wed Apr 15, 2009 9:12 pm

nitin360: Junior | Next Rank: 30 Posts; Posts: 16; Joined: Sat Feb 21, 2009 2:26 am; Location: india

by nitin360 » Wed Apr 15, 2009 9:29 pm

i think created is used for atoms and molecules from explosion .. not for particles which make interstellar dust ...

b. persists .. goes against noun as it is particles so plural verb
c. persisted.... against verb tense comprise ... persisted
d.they persist
e.are persisting
d and e does not make sense as
with conjunction and persisting is more good to ears than d and e ..

please revert if i m wrong

life is tragedy to those who feel and comedy to those who think

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Kunal_gmat: Senior | Next Rank: 100 Posts; Posts: 45; Joined: Wed Feb 11, 2009 9:59 am; Thanked: 2 times

by Kunal_gmat » Thu Apr 16, 2009 8:57 am

Big bang governs behavior of interstellar particles - progressive
particles comprised of atoms and molecules created - past
and these particles persisting - progressive is needed here.

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