单选题 In "I saw a thief stealing something ", the italicized part is
【正确答案】 C
【答案解析】[解析] 现在分词用法题。see sb. do/doing sth. 是“谓语+宾语+宾语补足语”结构,stealing someitting在这里作宾语补足语,对宾语a thief做补充说明,答案为C。