阅读下面的材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Lucy： Hello, Mary, you look really tired. What's the matter?
Mary： I didn't go to sleep ____ midnight last night so I didn't get enough sleep.
Lucy： Sorry to hear that. Why don't you go to sleep ____ (early) tonight?
Mary： I hope so, ____ I have two after—school classes today. So I can only start ____ (study) after dinner.
Lucy： Maybe you should tell your parents ____ you can't do so many things.
Mary： I did, but they think it's important that I take more after—school ____ (class).
Lucy： Well, they ____ (possible) want you to get into a good senior high school.
Mary： Yes, I guess that's ____ reason.
Lucy： You should talk to your parents again. Explain that you need to get enough sleep to stay ____ (health).
Mary： That's a good idea. OK, I'll try to talk to ____ (they) again.
