单项选择题
A．You must have wronged me. B．Oh! I’m so sorry about this. C．Please stop just a second. D．Are you Mr. Smith E．But may I ask you something first F．Is there anything I can do for you G．Now. sit down please.
A．Sure. What is it B．It’s very nice of you to say so. C．It’s nothing. D．Have a nice trip! E．Certainly. Here you are.