Помогите с английским, пожалуйста!

Choose the suitable preposition

Paul comes (from, of, out) Reading but he doesn't live there now.
He lives (at, on, in) the centre (in, of, off) London.
Great Britain is separated (by, from, off) Europe (at, with, by) the English Channel.
My aunt is proud (at, of, in) her son.