题目内容：

We are having a good time _ in the water.
A.to play
B.play
C.playing
D.to playing

优质解答

We are having a good time （C.playing） in the water.
我们在水中嬉戏玩得很开心.
have a good time doing sth,做某事玩得开心,要填doing的形式.

追问：

确定吗，只有这一种形式？

追答：

确定的。