他做了自己的决定——我与此无关。

He made his own decision - I ___had ___nothing ___to ___do ___with it.

我试图向他解释，我与蛋糕的消失无关，但他不相信我。

I tried to explain to him that I ___had ___nothing ___to ___do ___with the disappearance of the cake, but he didn't believe me.

她的成功与运气无关；全是努力工作。

Her success ___has ___nothing ___to ___do ___with luck; it's all hard work.