6. if/whether I liked classical music.
7. if/whether I could play video games.
8. what he was doing then.
9. why I didn't clean my room.
10. how he went to his school.
11. not to stay up late.
12. not to shut the door.
13. not to touch that picture.
14. asked Sara if/whether she would like to go out for dinner with him that night.
15. me not to be late again.
16. to carry the suitcase for Hoa.
17. his brother to work hard for the exam.
18. boys not to make that mistake again.
19. Mike not to stop there.
20. to open the door.