—Could I talk to Prof.Lee？ —_________________.（）A.Oh，it’s you B.Yes，speaking C.I’m waiting for you

—Could I talk to Prof.Lee？ —_________________.（）A.Oh，it’s you B.Yes，speaking C.I’m waiting for you

The question tests understanding of telephone conversation etiquette. When someone asks "Could I talk to Prof. Lee?", the most appropriate response if the person answering is Prof. Lee would be to confirm their identity.

The correct answer is B. Yes，speaking. This is a standard telephone phrase used to indicate that the person you're calling is the one speaking.

Option A ("Oh，it’s you") is inappropriate because it doesn't address the request to speak with Prof. Lee.

Option C ("I’m waiting for you") is irrelevant to the question asked.

In phone conversations, "Yes, speaking" directly confirms that the caller has reached the intended person, making it the natural and correct response here.