听力原文：W: Well, look at the words. Someone gave this book as a present, and wrote a note

on the inside of the front cover. It' s dated 1893. Maybe it' s worth something.

M: Everything on that shelf is worth fifty cents.

W: But if this is the signature of someone who is well-known, it might bring a lot more. I hear William Shakespeare's signature is worth about a million dollars.

M: Oh？ I can hardly read what that one says. Who wrote it？

W: The name looks like "Harold Dobson". Wasn't he a politician or something？ I' m going to buy this book and see if I can find a name looks like that in the library.

M: Good luck. Your poetry book may make you rich. But I think my seventy-five-cent mys- tery is a better buy.

Where is the conversation taking place？

A．In a second-hand book shop.

B．In a publisher' s office.

C．In a library.