What great fun it is to have a swim in a hot day in summer. A. aB. theC. /D. of

问题补充：

What great fun it is to have a swim in a hot day in summer.

A. a

B. the

C. /

D. of

答案：

A. a

B. the

(答案→)C. /

D. of

解析：考查冠词，fun是不可数名词，前面不加冠词，句型是：it‘s fun to do sth，what修饰fun，句意是;大热天游个泳是多么快乐的事啊。选C。