问题描述：
It was such afunny show that people cloudn't help laughing again and again.
为什么那个空填 laughing?还有另外的选项（A.laugh B.to laugh C.正确 D to laughing）还有句子的意思很模糊,
为什么那个空填 laughing?还有另外的选项（A.laugh B.to laugh C.正确 D to laughing）还有句子的意思很模糊,
问题解答：
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