Изберите правильное условное местоимение / наречие.A vet is someone who/which

Изберите правильное относительное местоимение / наречие.
A vet is someone who/which treats sick animals.
The book whose/which he gave me is very boring.
The camp who/where we first met is still our favourite place to go.
Thats the boy whose/who brother is a football champion.
That was the year which/when we went on holidays to Greece.
The athlete who/which got the first prize is Russian.
She is the girl which/whose father is a famous writer.
The reason why/who she went is still a mystery.