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double was doubling has doubled is doubled
Five percent of Americans are very unhappy. Over fifty percent of Americans are very happy. Twenty percent of Americans are very unhappy. Sixty to seventy percent of Americans are not happy.
lives; are live; are live; is lives; is
100 years 145 years 1975 years Over two million years
indicates introduces dictates determines
plating forming the engine room tank top doubler plating installed over the flat keel plate a watertight boundary formed by the inner bottom compartments between the inner and outer bottoms
under 30 percent 50 percent 55 percent over 70 percent
lives; are live; are live; is lives; is
is; is are; are are; is is; are
a: an the; an the; the a; the