补全对话（5分，每空1分。）
A: Lucy, you look sad. ____________
B: I didn’t pass the math exam. It is difficult for me to learn math. __________
A: Don’t worry. Maybe I could help you. You know, I always do well in math.
B: __________ Thank you.
A: You are welcome.
B: But I have another problem.____ _____
A: Why?
B: I often stay up late playing computer games at night.
A: Oh, it is bad for your health. _____
B: OK. I will have a try this night.

A. It sounds great. B. You should go to bed early. C. Why don’t you ask your teacher for help? D. What’s the matter? E.I can’t get up early in the morning. F. What should I do?