题目
R: Carter & Lee. How may I help you?
C: Hello, this is Anna Reed. May I speak to Mr. Patel?
R: He's on another line. Hold or leave a message?
C: ______
A. I'll put you through to his extension.
B. Could you ask him to call me back?
C. This is Mr. Patel speaking.
D. Sorry, wrong number.