A、In a shop. B、At a hotel. C、At a restaurant. D、At a library. B根据文中“housekeeping staff”和“Reception”等关键词可推断出对话发生在旅馆里，故选B。

W: Good morning, Mr. Jacob. Is everything all right?
M: No, it’s not. Someone’s stolen some of my valuables—(18) two rings and a gold necklace.
W: I’m very sorry to hear that, sir. Where were they?
M: In my room. And the door was locked. It can only be one of your staff. I want my things back. And fast.
W: Well, I can certainly understand that you’re upset about losing them and we’ll do all we can to help. If they really are missing, it’s a matter for the police.
M: What do you mean, if they are missing? I told you they were.
W: Yes, Sir. But first I’ll have one of the (17)housekeeping staff look through your room in case they’re still there. (19) But I must say that we can’t be held responsible. You should have deposited the valuables with (17) Reception. It says so on the Key Card.
M: That’s not good enough. I want to see the manager immediately.
W: I’ll be glad to call the duty manager for you, sir. But he’ll certainly say the same. We have clear instructions about valuables and we must follow them.
17: Where does this conversation most probably take place?
18: What valuables of Mr. Jacob have been stolen according to himself?
19: Why does the man want to see the manager?