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The new engine is being tested in the laboratory

А специальный ?

Общие:Is the new engine being tested in the laboratory?Isn't the new engine being tested in the laboratory?Альтернативный:Is the new engine or the new fan is being tested at the laboratory?К подлежащему:What is being tested in the laboratory?What isn't being tested in the laboratory?Разделительные:The new engine is being tested in the laboratoty, isn't it?The new engine isn't being tested in the laboratory, is it?