问题
选择题
We went to Hainan Island on May Day and had great fun ____ in the sea. [ ]
A. surf
B. surfs
C. surfing
D. to surf
答案
答案：C
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We went to Hainan Island on May Day and had great fun ____ in the sea. [ ]
A. surf
B. surfs
C. surfing
D. to surf
答案：C
