—Thanks for your help, but can you do me one more favor, please?
— , Sir. What’s it then?
A. Just a minute
B. My pleasure
C. That’s right
D. At your service
网友回答
A. Just a minute
B. My pleasure
C. That’s right
(答案→)D. At your service
解析：考查交际用语：A. Just a minute 请等会。B. My pleasure不用谢，C. That’s right对的，D. At your service随时为你服务。句意：--谢谢你的帮忙，但是能请你再帮一个忙吗？--随时为你服务，先生，是什么事？选D。