3. is sleepping

4. was sleepping

5. isn`t doing; are playing

6. weren`t doing

7. was reading

8. isn`t reading

9. is going

10. What are you doing now? I`m drinking tea.

11. Were you drinking tea... - No, I wasn`t drinking...  I was eating...

12. was reading; is reading

13. is playing;

14. was shining;  were singing

15. Are you eating...

16. Were you eating...

17. What is your fater doing...

18. What was your fater doing...

19. What is she crying...

20. What was she crying...

21. I`m enjoying...