A You look so tired,what's the matter with you?
B I'm stay up all night. I study for the math text.
A You shuold not do that. It's bad for your health.
B Oh, I will not do that.thank you very much.
A You are welcome ! A You look so tired,what's the matter with you?
B I'm stay up all night. I study for the math text.
A You shuold not do that. It's bad for your health.
B Oh, I will not do that.thank you very much.
A You are welcome !