B: About six hours.
O: That's not enough, it it? You ought to sleep at least seven hours. What time do you go to bed?
B: Between one and one-thirty.
O: Can't you go to bed earlier?
B: No, I usually have a lot of homework and must read my lessons, so I can't help being up late.
O: What time do you leave home in the evening?
B: I must be at school by eight-thirty, so I have to leave home by seven-thirty at the least.
O: You should have some recreation and not just study all the time.
B: You're right. I occasionally play tennis.
