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princestone-sc-telescope

by pradeepkaushal9518 » Sat Jul 03, 2010 10:36 pm
Scientists have trained their telescopes on Arp 229, a pair of merging galaxies, and saw stars exploding in numbers far greater than expected.


and saw stars exploding in numbers far greater than expected

and saw stars exploding in numbers far greater than they were expecting

and saw stars exploding in far greater numbers than expected

and seen stars exploding in far greater numbers than being expected

and have seen stars exploding in far greater numbers than expected
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by hardik.jadeja » Sat Jul 03, 2010 10:46 pm
Pick E

Only E maintains the structural parallelism "have trained" and "have seen".

A, B and C are ruled out because they change the tense unnecessarily.

D is ruled out because of ''being".

Hope that helps..
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