---Jack hurt his leg yesterday.
---Really? ?
A. What’s wrong with him
B. How did it happen
C. Wasn’t he too careless
D. Who told you that
网友回答
A. What’s wrong with him
(答案→)B. How did it happen
C. Wasn’t he too careless
D. Who told you that
解析：
试题分析:句意：—杰克昨天伤到腿了。—真的吗？事情是怎么发生的呢？根据语境判断说话人想知道杰克是如何受伤的，其他选项不符合语境，故答案选B。