Question
In the 1990s astronomers carried through exhaustive
lensing experiments involving the study of millions of stars in the galactic central areas and in the Magellanic Clouds to search for dark objects whose masses would cause lensed brightenings of background stars. i.           In the 1990s astronomers carried off ii.           In the 1990s astronomers carried in iii.           In the 1990s astronomers carried outSolution
The phrasal verb ‘carried out’ means ‘to act’ or ‘to do any task or work’. Hence it is correct and fit according to the context of the sentence.
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625, 125, 50, 30, 24, ?
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8 12 30 105 ? 2598.75
...- 741, 852, 1074, 1407, ?
