26. In 2017, your father installed solar panels to provide heat for their hot water, didn't he?
27. Your sister visited Rio de Janeiro last year, didn't she?
28. Mr. James watches a film on Netflix every day, doesn't he?
29. People use driverless cars widely in this area, don't they?
30. That boy rides a Segway to school every Saturday, doesn't he?
31. Since 1990, the population of the city has grown by 110,000 people, hasn't it?
32. Villagers in Phu Yen hold Hoi Mua festival every March to thank the God for the crop, don't they?
33. Your father installed glass in the windows to stop heat escaping, didn't he?
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