英语好的解答下啊,what.what a .how.how a的区别.

题目

英语好的解答下啊,what.what a .how.how a的区别.
_______good news!Liu Xiang won a golden medal in the 11th National Game in October,2009.
A.What B.What a C.How D.How a

答案

what是来修饰名词的,比如修饰单数可数时,what a big apple!
How是用来修饰形容词和副词的,比如 How fast he runs!没有How a这种用法的
那这道题的答案是what,因为修饰的是不可数名词news.选A