单选题 I have lost sight of my morn, but I just saw her ______in front of me.
A. were walking B. to have walked C. walk D. walking

【正确答案】 D

【答案解析】[解析] 感官动词see后面可以跟两种宾语补足语形式：一种是see sb．do sth，表示看到某人做某事的全过程；另一种是see sb．doing sth，表示看到某人正在做某事。本题表示看到正在进行的动作，所以选D)walking。