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

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. It’s very nice of you

C. That’s all right

D. At your service

答案：

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。