听力原文：WA Kevin, if you have a minute, I'd like to talk to you about who on the team will be going to Calgary with you. MB Sure. I'm free right now. WA Well, we have six people who have volunteered to go, but we only need five. Ordinarily it's the other way round, but we're going to have to make a decision about whether Tracy or Dave should be the one who doesn't go. MB Let me talk to each of them first. Perhaps one of them isn't interested in going. But if they're both interested, I'll have to think about it a bit before I decide. What is learned about the Calgary trip?