— Can I speak to Mr. Wang please?— A. Who are you?B. I’m Wang.C. Speaking.D. Are you John

问题补充：

— Can I speak to Mr. Wang， please?

—

A. Who are you?

B. I’m Wang.

C. Speaking.

D. Are you John?

答案：

A. Who are you?

B. I’m Wang.

(答案→)C. Speaking.

D. Are you John?

解析：Speaking是This is Mr. Wang speaking的缩写形式，意思是：请讲，我就是你要找的Mr. Wang。