问题
选择题
The last time we had great fun was ________ we were visiting the Water Park.[ ]
A. where
B. how
C. when
D. why
答案
答案：C
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The last time we had great fun was ________ we were visiting the Water Park.[ ]
A. where
B. how
C. when
D. why
答案：C
的最大值是( )． 