—Thanks for your help but can you do me one more favor please?— Sir. What’s it then?A.

问题补充：

—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

答案：

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。