某电视剧摄制组布置一个三国初年曹植书房场景，其道具根据史实判断其中搞错的是

①书案上毛笔、纸张②一叠印刷的书籍

③墙上挂有临摹的《洛神赋图》④墙角有两个实心皮革球[ ]

A．①②

B．③④

C．①④

D．②③

---What did the policeman say to you just now?

--- He asked _______ when the accident happened.

A．what I was doing

B．what was I doing

C．what I am doing

D．what am I doing