—I'm afraid I must be off now. —. A. No problemB. Never mindC. See youD. It doesn't matter

问题补充：

—Im afraid I must be off now.

—.

A. No problem

B. Never mind

C. See you

D. It doesn matter

答案：

A. No problem

B. Never mind

(答案→)C. See you

D. It doesn matter

解析：句意：--现在我恐怕要走了。--再见。No problem没问题；Never mind没关系；See you再见；It doesn matter没关系。根据句意故选C。