---------- fine weather it is today!A.What B.What a C.How a

__________ fine weather it is today!A.What B.What a C.How a D.How
选A
首先weather不可数,所以BC都不对,不能加冠词的
其次如果是how的话
应该是【How fine the weather is today!】
how强调的是形容词
what强调的是名词
what +a/an/the +adj+n
how+adj+the +n+be