Ответ:
1. Cathy has done a bungee jump three times.
2. Harry has broken his leg so he can't walk.
3. Have Tina and Ben ever visited Rome?
4. We have had football practice twice this week.
5. John have seen Avatar five times.
6. I have not eaten anything all day.
7. Has Ann seen the Leaning tower of Pisa?
8. They have booked a room at a luxurious hotel.