I.

1. had I got into the bath than someone knocked at the door

2. have I seen anyone in my life drink as much as you

3. the bell rang did he finish his work

4. had he left the office when the phone rang

5. she not worn a seat-belt, she would have been injured

6. you study hard will you pass the exam

7. a new pay offer did the workers call off the strike

8. I rich, I would buy a castle

9. all the guests had gone home could they relax

10. violent was the storm that whole trees were uprooted

11. have we ever watched a more exciting match than this

12. enormous was the liner that it could not enter the harbour

13. does Tom play the guitar well but he also sings beautifully

14. free or busy as my father is, he always spends time with family

15. quietly did she speak that I could hardly hear