【正确答案】 A

【答案解析】原文：M: I had an appointment with Dr. Smith this afternoon and I need to change it to tomorrow morning. W: Let me check. Tomorrow morning...no problem. Q: When does the man want to see Dr. Smith?题干问的是"男士是什么意思"。根据对话内容，女士提议本周去市博物馆，男士说他要准备自己的演示，由此可知，男士去不了市博物馆。故选 A。