听力原文：W: What are you reading, Paul? M: Oh, it's a book about naval engineering. W: Why are you reading on Friday evening? M: Because I've got to write an essay this weekend. W: What are you going to do when you've qualified? M: I don't know. I'd like to get a job abroad, I think. What are you going to do when your year at Weston is over? W: l'm going to spend a few weeks touring Britain, then I'm going back to Canada, I suppose. M: What is John going to do? W: I think he's going to open a branch of' pretty feet'in London. M: What is he doing in Italy? W: He's seeing some designers here. He's coming back tomorrow. By the way, what are you and Sue doing on Saturday evening? M: I don't know yet. Why? W: Well, I thought we could cook another of our suppers and invite John and Sue. M: Oh, no! Not Potato Salad again! Sorry, Barbara, but I really have to read this book. When does the conversation take place?