Question

Make one sentence from two. Use which, that, whose, whom. 
1. I bought a dress. My friend advised me to buy it. 
2. We went to the party. It was very interesting. 
3. That is the village. We used to go there every summer. 
4. This is Mary Jones. I've got a letter from her. 
5. I was looking for a key. I've found it now. 
6. This is the house. They bought it last year. 
7. This is the actor. I like him very much.

Answer 1

1 I bought the dress which/that  my friend advised me to buy.
2 We went to a party which was very interesting. 
3 That's the village that we used to go to every summer. 
4 This is Mary Jones whose  letter I've got. 
5 I was looking for the key which I found just now. 
6 This is the house that they bought last year. 
7 This is an actor whom I love very much