参考答案：B

解析：[听力原文]19-22 M: Good morning, Patricia. How are you these days W: Fine, thanks, Bill. Glad to see you again. What news can you bring from your business trip to our headquarters in New York last week M: Well, not bad ones. During my stay in New York last week, I met our company’s CEO Mr. Johnson. He wants us to put on a local conference sometime next month. I remember you made most of the arrangements for our last conference, and things went so smoothly. I thought I couldn’t do better than ask you for some tips. W: I’ll be glad to help. Is it a sales conference again M: Yes, in a way. It’s mainly for agents from home and abroad, and we’re inviting a few of our influential customers. The objectives are mainly to introduce the products we’re putting on the markets next season, to describe our services to customers and so on. W: And how many people are expected to attend this time Last time, it was about 220. M: We’re counting on 300 this time. No more than 350. W: Then we cannot use the seaside conference hall again. It has a capacity of only 250. M: That’s the trouble. I was thinking of the President Convention Center, which has a larger capacity. Besides, I haven’t worked out all those details yet. Then there are other things to arrange, like loudspeakers and visual aids. I’m going to make a checklist. W. Yes, I did that, too. I’ll be glad to give you a hand. M: That would be great, Patricia. I’d very much like the chance of using some of your experience. May I invite you to lunch today And then we could have a bit of planning session about it all afterwards.19. What was the man doing last week