it is to jump into a pool or go swimming in a river in summer!A. What great funB. What a g

问题补充：

it is to jump into a pool or go swimming in a river in summer!

A. What great fun

B. What a great fun

C. How great fun

D. How a great fun

答案：

(答案→)A. What great fun

B. What a great fun

C. How great fun

D. How a great fun

解析：考查感叹句。本题考查what + (a/an) + adj. + n. + 主语 + 谓语，fun作名词为不可数名词，选A。