It's much better than _______(have） a class.怎么填

It's much better than _______(have） a class.怎么填
It's much better than _______(have） a class.怎么填

It's much better than _______(have） a class.怎么填
having
A is better / bigger.than B
两个同级比较.

haveing

it is 形容词for sb to do sth
应该填to have