听力原文:W: Hi, bow do you like this class? M: Oh, I really like it. W: Yeah, me too, so far. M: It' s a little bit hard. W: Yeah. I had the same teacher last year. She is a little tough. M: Oh, you did? Um... are her tests hard? W: Her tests aren' t that bad if you keep up with the reading. What' s the probable relationship between the two speakers?