6. I asked a dog owner if the pets travel free there

7. She asked me if I could bring her dog into the compartment with her 

8. The man asked Bill if this train stopped at York

9. Jack asked Lan how long she had waited for him

10. I asked my aunt if she could got coffee on the train

12. I asked him if he had reserved a seat for me

13. Bill asked Mai what country she came from

14. An asked Thanh how long she had been there

15. I asked Peter if he worked as well as studying

16. Nam asked Na what kind of music her father liked best

17. The students said that we had to study hard for those important exams