___great fun they have ___on the playground A.What a;to play B.What;playing C.How a;to play D.How ;playing

问题描述:

___great fun they have ___on the playground
A.What a;to play B.What;playing
C.How a;to play D.How ;playing

B
fun是不可数,不用加冠词a,正在玩,用动词进行式
请及时采纳,多谢!