I's something we____ to do in our free time just for the____ of it请说明理由

I's something we____ to do in our free time just for the____ of it请说明理由
I's something we____ to do in our free time just for the____ of it
请说明理由

I's something we____ to do in our free time just for the____ of it请说明理由
It's something we like to do in our free time just for the fun of it.这 是 我 们 闲 时 爱 做 的 事 ,纯 粹 为 了 好 玩 .