Ответ:

1. haven't had
2. made
3. had already made
4. would make
5. will make reservations before I go
6. was preparing the roof ,he broke
7. It has already stopped snowing
8. had already stopped snowing
9. It will probably snow
10. It's snowing
11. went diving when we were on holiday ....
12. He has been interested in it....
13. The weather won't be warm tomorrow
14. She hasn't been to dentist...
15. She is studying English. She has been studying it for three years.