【题目】It is ________ to swim in the swimming pool in summer.
A.great fun
B.funny
C.a great fun
D.great funny

【答案】A
【解析】A. great fun 很有趣；B. funny滑稽可笑的；C. a great fun错误说法，fun不可数；D. great funny错误说法，应改为greatly funny；句意：夏天在游泳池里游泳太有趣了。根据句意，故选A。