【答案解析】[听力原文]15-17 W: Jack, I'd like to have a conference with you. M: Sure, but I'm not free until after lunch. Can we meet then? W: O.K. Let's make it around two o' clock this afternoon. M: Fine. I'll come to your office either at two o' clock or earlier if I can. W: All right. The sooner the better. M: O.K. I'll try to make it as soon as possible.