Wilson: Hello. May I speak to Mary? Mary: ______A.Sorry, the number is engaged. Will you h
Wilson: Hello. May I speak to Mary? Mary: ______
A.Sorry, the number is engaged. Will you hold?
B.Yes, speaking.
C.Hello. Who are you, please?
D.Hello. Thank you for calling.
请帮忙给出正确答案和分析,谢谢!