Задайте к предложениям разделительный вопрос.
1. Henry Cavendish conversed little and always dressed in an old-fashioned suit.
2. He produced inflammable air by dissolving metals in acids.
3. Cavendish worked out a comprehensive theory of electricity.

Henry Cavendish conversed little and always dressed in an old-fashioned suit, didn't he?

He produced inflammable air by dissolving metals in acids, didn't he?

Cavendish worked out a comprehensive theory of electricity, didn't he?