Writeacher, I can't vary the sentence, I just have to say which one is correct.
Paris, which I visited last year, is one of the most romantic places in which I have ever been/I have ever been to.
(I have to determine whether the correct preposition is IN OR TO.
Thank you.
Would be OK: ...places to which I have ever been.
So I'd go with this one: ... places I have ever been to.