— Thanks for your help, but can you do me one more favor, please?
— , Sir. What’s it then?
A. Just a minute
B. It’s very nice of you
C. That’s all right
D. At your service
网友回答
A. Just a minute
B. It’s very nice of you
C. That’s all right
(答案→)D. At your service
解析：At your service. 听您吩咐。