15. Don't have
16. Doesn't phone
17. Doesn't do
18. Help
19. Does he do
20. Goes
21. Do
22. Go
23. Has
24. Go
25. Has
26. Meet

15.Students in my class don't have breakfast.
16. He usually doesn't phone me.
17.She often doesn't do her homework in the evening.
18.Do your parents help you with your homework?
19.Does he do the housework everyday?
20.Does she sometimes go fishing?
21.What do the workers of your factory often do on Sunday?
22.Where does she usually go on Monday?
23.What does Nam often have for breakfast?
24.How does your mother go to work everyday?
25. She has bread and milk for breakfast everyday.