My mother often tells me not to play ____ fire. [ ]

My computer game is ______ the drawer and my books are _______ the sofa. [ ]

They are _____ in Shenzhen now, I think they must enjoy themselves.[ ]

Must he finish the work before supper?—-No, he . He finish it after supper.

Do you know _________?– Yes, I do. She came here on foot.