How is your leg?
回复你的问题补充：What's wrong with your leg?
括号里面几个空?
两个：what's wrong
三个：what's the matter三个！谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢谢what's wrong with和what's the matter，表示……怎么了？……出什么问题/毛病了？