Yes, I promise, and now it is up to you.

是的，我答应过，现在就看你的了。

It is up to you to choose.

这都由你来选择。

The answer is simple - It is up to you.

答案很简单——这取决于你自己。

If you don't feel like, it is up to you.

如果没有想加入的感觉，它是你的事情。

It is up to you to look after the children.

应该由你负责照看这些孩子。