Good morning, may I speak to Mark, please?
A.Who's there?
B.Who's that speaking?
C.Who are you?
D.Who wants to speak to Mark?
正确答案是B
Good morning, may I speak to Mark, please?
A.Who's there?
B.Who's that speaking?
C.Who are you?
D.Who wants to speak to Mark?
正确答案是B