M: You're going to wear out that typewriter. W: Oh, hi. What are you doing here at this time of night? M: I should ask you that question. Do you have any idea what time it is? W: About ten or ten-thirty? M: It's nearly midnight. W: Really? I didn't have any idea it was so late. M: Don't you have an early class tomorrow morning? W: Yes, at seven o'clock. My part-time class, for the students who go to work right after their lesson. M: Then you ought to go to bed. W: Ok., Question: What class the woman will teach tomorrow? (A) Writing class. (B) A part-time class. (C) The passage doesn't tell us.
(B) A part-time class.