— made Daisy wild with joy?
—Her success in the A-level exam this year.
A. How was it that
B. When was it that
C. Why was it that
D. What was it that
网友回答
A. How was it that
B. When was it that
C. Why was it that
(答案→)D. What was it that
解析： 考查特殊疑问句的强调句型，根据答语：今年他在A级别的考试中成功了，可推断出上句句意就是什么使黛西欣喜若狂？所以选D。