21. “What do you think about leaning language?” Ba asked his teacher.
® Ba-------------------------------------------------------------------------------------------------
22. “How many books do the students need?” The librarian asked my teacher.
® The librarian------------------------------------------------------------------------------------------
23. “What size of shoes do you want, Madam?” The salesman aksed my mother.
® The salesman------------------------------------------------------------------------------------------
24. “How do people learn languages in general?” Ba asked Mr Brown.
® Ba-------------------------------------------------------------------------------------------------
21. Ba asked his teacher what he/she thought about learning language.
22. The librarian asked my teacher how many books the students needed.
23. The salesman asked my mother what size of shoes she wanted.
24. Ba asked Mrs. Brown how people learned languages in general.