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gmat_Tutor
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Of the two pumps that is being redesigned, the positive-displacement pump is promising because it is immune to sudden shifts in the proportion of liquid to gas in crude mixture.
A. Of the two pumps that is being redesigned, the positive-displacement pump is promising
B. Of the two pumps being redesigned, the positive-displacement pump is promising
C. Of the two pumps which is being redesigned, the positive-displacement pump is promising
D. Of the two redesigning pumps , the positive-displacement pump are promising
E. Of the two pumps redesigned, the positive-displacement pump have promised
OA: later.
Would any expert explain where to use "BEING" and where not use BEING?
Thanks.
A. Of the two pumps that is being redesigned, the positive-displacement pump is promising
B. Of the two pumps being redesigned, the positive-displacement pump is promising
C. Of the two pumps which is being redesigned, the positive-displacement pump is promising
D. Of the two redesigning pumps , the positive-displacement pump are promising
E. Of the two pumps redesigned, the positive-displacement pump have promised
OA: later.
Would any expert explain where to use "BEING" and where not use BEING?
Thanks.

















