【正确答案】 A

【答案解析】原文：W: Excuse me. I’m doing a survey and I hope you wouldn’t mind answering a few questions. M: How long will it take? W: Just a few minutes. Some questions about smartphones. M: Okay, go ahead. W: Which brand is most popular with young people here? M: It’s hard to say. But I think Huawei is the most popular. W: Why do you think so? M: Because its camera performance is excellent. W: Have you tried an Apple, Samsung or Xiaomi? M: Never. I use a Huawei. I enjoy using it also because of its battery life. W: I see. Thank you for your time. M: Not at all.8. Which brand is most popular with young people according to the man?9. Why do young people like the brand the man has mentioned? 10. What is the woman most probably doing in the conversation?信息推断题。对话开始女士告知男士自己在做一个调查，希望男士回答几个关于手机的问题，接下来的对话中女士向男士询问了其最喜欢的手机品牌及其原因、是否使用过苹果等其他品牌的手机等问题。由此可知，女士是在向男士做调查，因此A)“做调查”为本题的答案。B)“索取价目表”、C)“选智能手机”和D)“推销产品”均与对话内容不符，因此可以排除。