fill in which who whose or where

Ответ от таня карнаух[гуру]
1.Who has done it is unknown.
2.He showed me the skin of the wolf which he had killed.
3.The man who was here is a bookkeeper.
4.The books which are on the table should be returned to the library today.
5.That is the girl whose brother came to see us the other day.
6.Do you know the man whose house we saw yesterday?
7.I am going to spend my vacation in the village where I was born.
8.I am looking for the house where I can spend time with my friends.
9.There is the student whose father has been awarded the State Prize.
10.The man who is sitting next to me is my English teacher.
11.Mr.Ivanov's article,which I read yesterday, is very interesting.
12.He showed me the letter which he had received from his sister.