8 They had cooked the meal before the lights off.

Для выполнения задания необходимо перевести предложение из активного залога в пассивный. Воспользуемся знаниями грамматики английского языка.

Активный залог: They had cooked the meal before the lights off.

Пассивный залог: The meal had been cooked by them before the lights went off.

Ответ: The meal had been cooked by them before the lights went off.