Ответ:
- They live in London, don't they?
- He didn't go to the park yesterday, did he?
- The children are watching TV at the moment, aren't they?
Проверка за 10 секунд: don't they, did he, aren't they
Редфлаг: Question tag - короткий вопрос в конце предложения, который используется для проверки информации.