the matter在这里相当于（wrong)adj
what is the matter?这里的what是个主语,be是系动词,the matter是个形容词的.
Is there anything the matter with you?
=Is there anything wrong with you?
B则应该是the girl's name作主语的.
The girl's name was what（what是表语）
又如：
I don't know who you are.who表语
I don't know what you are.what也是表语为什么the matter是作形容词？？？？matter不是动词或名词吗？这个结构是比较特别的，记住就行了。the matter在这个结构中相当于形容词。