— Hello! Can I speak to the headmaster please?—A. Who are you please?B. Of course you c

问题补充：

— Hello! Can I speak to the headmaster, please?

—

A. Who are you, please?

B. Of course, you can.

C. Who is it, please?

D. Sorry, you can .

答案：

A. Who are you, please?

B. Of course, you can.

(答案→)C. Who is it, please?

D. Sorry, you can .

解析：情景对话。此对话为电话用语，在不明白对方是谁的情况下可用it，因此选C。