Ответ:

1. went, 2. had arranged, 3. has already done, 4. started, 5. did you do, 6. asked, 7. was checking, 8. didn't pay, 9. didn't book, 10. will start, 11. will ptobably do

Ответ:

1. went

2. had arranged

3. has already done

4. started

5. did you do

6. asked

7. was checking

8. didn't pay

9. didn't book

10. will start

11. will probably do