Ответ:
1I think we are going to sailing (to go sailing) tomorrow if the weather is nice.
2She can’t meet you tomorrow, Ron, because she is flying (to fly) to Rome for a few days.
3Our daughter is going to backpacking (go backpacking) in July with her boyfriend.
4Darling! I’ve got the tickets! We are spending (to spend) a week in Rio de Janeiro!
5When is he going to hiking (he/to go hiking) in the Alps?
6Maybe Sandra is helping (to help) us choose the right hotel.
7How are you relaxing (you/to relax) there? I’m not sure because I don’t know the place.