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Разделительные вопросы

The new engine is being tested in the laboratory

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?