问题补充：
—Can I speak to Mr. Smith, please?
—He is having a meeting in the next room.
A. Who are you?
B. Hold on please.
C. Speaking, please.
D. Are you Mr. Black?
答案：
A. Who are you?
B. Hold on please.
C. Speaking, please.
D. Are you Mr. Black?
解析：选B。考查情景交际。此处B项为打电话用语, 意为“请稍等”, 符合语境。
【知识拓展】打电话用语
This is. . . (speaking). 我是……(不说I am. . . )
It is. . . here. 我是……
请找……接电话好吗?
Who’s that(speaking/calling)? 你是谁? (不说Who are you? )
Is that. .. (speaking)? 你是……吗?
Is. . . there? ……在吗?
Is. . . in? ……在吗?
Hold on, please. 请稍等。
Hold the line, please. 请稍等。
Can I take a message? 你可以留个口信吗? (对方要找的人不在时)
Can you give/leave a message? 你可以留个口信吗? (对方要找的人不在时)
Can/Could I ask who is calling? 请问您是哪位?
May I have your telephone number? 您的电话号码是多少?
