---Will you please help me to take care of my cat when I go out? --.A. My pleasure.

问题补充：

-----Will you please help me to take care of my cat when I go out?

----- .

A. My pleasure.

B. Its a pleasure.

C. With pleasure.

D. At my pleasure.

答案：

A. My pleasure.

B. Its a pleasure.

(答案→)C. With pleasure.

D. At my pleasure.

解析：考察交际用语。AB我的荣幸（帮助对方做完某事以后回答对方的感谢）；C我的荣幸（答应对方做某件事情，事情还没有做）结合句意可知C正确。句意：—当我外出的时候，你愿意帮助我照顾我的猫吗？—我的荣幸。