The Last Question

I believe that everyone has free-will, but I also believe that our actions are already pre-determined. So therefore I believe in determinism. Even though God gave us the right of freely choosing what we want to choose, He already knows what will happen and how it will happen, and he is always right. So in truth all the choices we make were already determined before we even made those choices. So how can true free-will exist when the choices we make are already determined? Thats right I they really can't exist thats why I believe in determinism and not true free-will, more like partial free-will.