1) The family slept for several hours and heard the sound of metal chains, didn't they? - Yes, they did.
2) Mr. Otis was very angry, wasn't he? - Yes, he was.
3) Another door opened and two pillows flew out, didn't they? - Yes, they did.
4) The ghost did not escape to his room, did it? - No, it didn't.
5) The ghost promised to take revenge, didn't it? - Yes, it did.
6) The Americans were not even afraid of him, were they? - No, they weren't.