【正确答案】 C

【答案解析】W: Can you describe what you do? M: I wash office building windows. I go high up in the basket to reach the windows. Q: What is the man's job? 【解析】这是一道事实细节题。从对话中可知，男士清洗办公楼的窗户。所以选项为C，他是个窗户清洁工。关键词句：I wash office building windows；to reach the window.