10．--- Hello, John here, can I speak to Mary , please?
--- .
A. Of course, but she is out
B. She will be back in a moment
C. You may leave a message
D. Hold on, please
网友回答
A. Of course, but she is out
B. She will be back in a moment
C. You may leave a message
(答案→)D. Hold on, please
解析：可联系客服索取此答案。