A、On the street. B、In a park. C、At a museum. D、In the police station. D对话中，女士称呼男士为officer，并告诉他自己找不到女儿了，故可推知男士是警察，对话发生在警局。故答案为D项。

W: Don’t forget to buy some milk when you come back home; we have none in the fridge.
M: Well, I’m afraid I can’t go home on time today, as I have to meet a client in town this afternoon. But if you don’t mind, I will do the shopping.
Q: What’s the probable relationship between the two speakers?

W: Officer, I need four help. My little daughter, Melinda, I can’t find her. We went to the museum today. She is only six...
M: Please take a seat and calm down, Madam. Take a deep breath and tell us what have happened.
Q: Where are the two speakers most probably?