Odpowiedź: 

2. would opt 

3. would go 

4. weren't 

5. get 

6. spend 

7. would have bought 

8. hadn't purchased 

9. wouldn't do 

10. paid 

11. would appreciate

Uzasadnienie: 

1, 2, 3, 4, 9, 10 - zdanie warunkowe drugiego