COMPLETE THE STORY

Class : ...................(17) teacher.
Ms Hoa : Hello, class. ...................(18), please!
Ms Hoa : ...................(19) your books and ...................(20), please!
Nam : Sorry. ...................(21) and ...................(22)?
Ms Hoa : Yes, ...................(23). ...................(24).
Nam : ...................(25), Ms Hoa.