Question

We went to Hainan Island on May Day and had great fun ________ in the sea.

1. A.
   surf
2. B.
   surfs
3. C.
   surfing
4. D.
   to surf

Answer 1

C
考查特殊结构。句意为：我们“五·一”去了海南岛而且在海上玩得非常高兴。根据have fun+动名词来判断应该选C。