问题详情

Speaker A： May I speak to Dr. Wang, please？
Speaker B：_________.
A.Hold on a second, please. I’ 11 put him on.
B.Sorry, Mr. Wang is not available right now.
C.I am not sure because I don, t know what he is doing.
D.Thank you very much for calling.请帮忙给出正确答案和分析，谢谢！