Her brother be at home now, because he was seen playing basketball in the stadium just now.

下列各项中，加点的词语使用不恰当的一项是（ ）

re were no automatic washing machines,people would have to wash their clothes ______ hand or ______ hand-operatedmachines

She looked at the professor and wondered where she_______ him.

What will you be doing at 4:00 tomorrow afternoon?—I _____ in my office