单项选择题
A．I'm afraid I didn't cook very well. B．Of course, you may. C．Please help yourself. D．Don't be so polite.
A．Good afternoon, how can I help you B．Are you taken care of, sir C．Can you spell it for me D．May I have your name
A．another pair of shoes. B．nothing serious. C．easy does it. D．a piece of cake.