单选题 I saw Joan ______ with her coworker the other day. I hope she's okay.
A. to fight B. fought
C. having fought D. fighting

【正确答案】 D
【答案解析】[解析] 感官动词see的宾语补语的位置要用动词原形，为了强调当时情况正在进行，也可以用现在分词。
词汇：coworker同事