问题补充：
—Hello, may I speak to Sandy, please?
—.
A. Who are you?
B. Whats your name?
C. Im Sandy.
D. This is y speaking.
答案：
A. Who are you?
B. Whats your name?
C. Im Sandy.
(答案→)D. This is y speaking.
解析：句意：可以让Sandy接电话吗？打电话时，介绍自己用this is …,问对方时用 who is that? Is that …? 故选D。我就是Sandy.
