W: Robert, you play the guitar, don't you? M: I used to. But I haven't played it for quite some time. I don't really have time these days with all my studies. Why do you ask? W: I'm trying to organize a group to play at some parties on weekends. We still need a guitar player. M: Well, I don't know. But your idea sounds fun to me. W: Oh, it will be. I'm more or less in charge of things, so if you want to give it a try, you're in. It's as easy as that. Besides, it's a great chance to get out to meet people. M: But I told you I haven't practiced for a long time. I don't know if I remember any songs I used to play. W: Don't worry about it. I just thought I'd ask you to try and join us sometime when we were practicing. We'll be practicing for a few months before we give performances. M: OK, I'll have a try. W: I'm sure you can do it. And it will be fun, too., Question: Why is Robert not sure of joining the group? (A) He doesn't think he is good enough. (B) He doesn't have time to practice. (C) He isn't interested in joining it.
(B) He doesn't have time to practice.