Нужно вставить правильный вариант, ) 1) sustainable future must for the next generations. a to be provided b provided c be provided d have provided 2) wastes into the atmosphere, water and soil. a to be released b released c is released d are released 3) what would happen if we continue fossil fuels at present rate? a to be consumed b consuming c consume d to be consuming 4) relatively inert silicon is sure a major material used in solar cells. a to be b be c to have been d 5) scientists looked for the optimal way of energy. a obtaining b obtain c obtained d to obtain 6) the pressure can cause serious fault of the engine. a increase b increases c increasing d to increase

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