单项选择题
A．Come on. It's not that bad. B．Yes, you are good at it. C．Really Congratulations! D．It's none of my business.
A．I hope he will call me back B．No. I'll call somebody else C．I don't think it's appropriate D．Don't bother. I'll try his cell
A．I'm afraid not. B．Can you walk slowly, please C．Let me think of it. D．Who knows