Were the design of cars improved the fuel consumption ( to reduсе) If a scientific research is closely linked with practice the results (to be) какую форму глагола вставить

Were the design of cars improved the fuel consumption ( to reduсе) If a scientific research is closely linked with practice the results (to be) какую форму глагола вставить ?
Гость
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Гость
Would be reduced, are.
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