it is to jump into a pool or go swimming in the sea when you visit Hawaii!
A. What fun
B. What a fun
CHow fun
D. How a fun
网友回答
(答案→)A. What fun
B. What a fun
C. How fun
D. How a fun
解析：考查fun的用法：fun是不可数名词，用what修饰，fun不加冠词，句意是：当你到夏威夷的时候跳到水池里或到海里游泳真是有趣的事。选A。