－Thank you for your help.

－It's my pleasure.

[　　]

—Better get down to your work, Jack.

—          .

A．It’s my pleasure                     B．Not to mention it

C．Mind your own business               D．You’re welcome

—I am leaving for Switzerland next week.

—           !

A. That’s all right        B. It’s a pleasure         C. Enjoy yourself        D. You’re welcome