题目

 —____________?  —I’d like to book some tickets.                             A. What can I do for you              B. What do you do C. What’s up                         D. What are you doing      答案： A   What can I do for you?是售货（票）员常用的交际用语，意为“你想要什么？”。解方程组：(本题10分)（1）                 （2）