单选题 If the task is too complicated to figure out on ______ own, please don't hesitate to ask one of our representatives, who are here to help.
A. you B. your C. yours D. yourself

【正确答案】 B
【答案解析】[解析] 本题选择适当的代词。on ______ own是“介词+……+名词”结构的介词短语，横线处应填入修饰名词own的物主代词。On one's own表示“独立地”。