— you got to know my telephone number?
—Through a friend of yours.
A. What was it that
B. How did
C. Where was it
D. How was it that
网友回答
A. What was it that
B. How did
C. Where was it
(答案→)D. How was it that
解析：考查状语从句和强调句型。根据回答Through a friend of yours.，说明问对方的方式。故D正确。句意：你是如何找到我的电话号码？—通过我的一个朋友。故D正确。