Ответ:

Seven hours 20 minutes

2. thirty minutes after six

3. four o'clock

4. without fifteen minutes three hours

5. two o'clock

6. seven hours and twenty minutes

7. twelve hours thirty-three minutes

8. three hours and fifteen minutes

9. without five minutes ten hours

10. nine hours twenty-five minutes

11. without a twenty-minute second hour

12. nine hours five minutes

13. without ten minutes twelve hours

14. twelve hours ten minutes

15. without five minutes four hours