—Could I use your pencil for a few moments please?— I'm not using it myself.A. Come onB.

问题补充：

—Could I use your pencil for a few moments, please?

— Im not using it myself.

A. Come on

B. It depends

C. Go ahead

D. Thats great

答案：

A. Come on

B. It depends

(答案→)C. Go ahead

D. Thats great

解析：考察交际用语。A加油；B看情况而定；C去做吧！D太棒了。加油：—我可以用你的铅笔吗？—去用吧！我现在不用。根据句意说明C正确。