听力原文：M: I'm so tired I can't see straight. W: You've been tired a lot lately, haven't you? M: Well, over the last weeks I'ye had to stay up most of the night to to observe star configurations for a project for my astronomy class. It's awful, no matter what time I go to bed I always wake up at 6 A. M. That's the time I usually get up. W: Your biologyical rhythms probably haven't adjusted to your new schedule. I've read what some people have a lot of trouble when their sleep rhythms are interrupted. Even sleeping pills don't help them M: I know, in fact, I'ye heard that there are now several special treatment centers for sleep disorders across the country. Some people sleep too little, some sleep too much, some walk in their sleep. W: I'd like to find out how to treat problems like that, Maybe you should go to one of those centers. M: Not me! After next week, my project will be finished, and I'll go back to my regular hours. Now I know for sure that to be don't want to be an astronomer. What has the man not been able to do recently?