问题补充：
—Hello, ?
—This is Tom Green. May I speak to Andy?
A. who’re you
B. who’s that calling
C. are you Tom Green
D. who is this speaking
答案：
A. who’re you
(答案→)B. who’s that calling
C. are you Tom Green
D. who is this speaking
解析：句意：你好，请问你是谁？我是格林·汤姆。我能和安迪说话吗？who’s that calling多于电话用语中，that指代是“你”，this 指代“我”，故选B
