$\textit{o.}$ Britain's mother asked him if he was planning to go to school by train.
`p.` Huy asked Mai if that was her pen.
`q.` Minh asked Lan if her parents were living there.
`r.` Nguyet asked Phu if he had done his homework the night before.
`s.` Mrs. Hoa asked An if she had met her aunt.
`t.` My friends asked me if my school had 12 classes.
`u.` She asked me if there were 39 students in that class.
