你开心，那才是最重要的事。

You're happy and that's ___the ___main ___thing.

最重要的事是开心并爱自己。

___The ___main ___thing is to be happy and to love yourself.

对于成功的面试，准备是最重要的事。

For a successful interview, preparation is ___the ___main ___thing.