—Excuse me!—.—Could you tell me how I can get to the first department?A. Pardon?B. Why?C.

问题补充：

—Excuse me!

—.

—Could you tell me how I can get to the first department?

A. Pardon?

B. Why?

C. Yes?

D. Please.

答案：

A. Pardon?

B. Why?

(答案→)C. Yes?

D. Please.

解析：“Yes？”用于口语，表示听到了对方的话，且进一步询问对方所需。其余选项无此用法。