单项选择题
A. Yes, I am Mr. Smith. B. No, he is not in the office fight now. C. Speaking ! D. He is not here. Can I speak for him
A. What can I do for you B. What' s the matter C. At your service. D. Just a second, pleas
A. Do you want to buy anything B. Excuse me, what are you doing C. Are you just looking around D. Anything I can do for you