What great weather it is today 在great前面加a吗?

What great weather it is today 在great前面加a吗? It is a great weather today ( ) ( ) great weather it is today! 改错;Today it is a great weather,isn't it? 改错.What a great weather today! what a great day it is today这句话对不对? What great weather today 改为同义句. 改错:what a great weather? What a great weather .改错 what _ good weather it is today! 要加a吗? _i most w today is a great day.可以这样说吗?还是it is a great day today.并延伸. What a sunny weather it is today