Grammar review: practical exercises-2 (that/which)

To continue with our grammar-review program, today I suggest an exercise to give you the opportunity to practise the two relative pronouns which and that
http://sanchezbenedito.blogspot.com.es/2013/06/cuando-se-usa-that-y-cuando-which.html

EXERCISE

Fill in the gaps with that or which as adequate. In some cases, you'll find that both are possible:

1.- He has hundreds of books, most of ..........are unread.
2.- A computer and a few CDs was all .........was taken in the robbery.
3.- We were told that we would be held responsible for anything ........went wrong.
4.- We didn't like the hotel at .......... we stayed to last summer.
5.- He kept me waiting for two hours, ..........annoyed me intensely.
6.- The cheque ...........he was given by the buyers was returned by the bank.
7.- The thought of going home to his family was all ........kept him happy while he was working abroad.
8.- The biggest event next year will be the Olympic Games, .........will be held in July.
9.- This is the bridge from .........he jumped.
10.- That's a tradition ...........goes back to the 17th century.
11.- There was little ..........interested me at the exhibition.
12.- Take that lift over there; it's the only one ........ works.

KEY

1.- which; 2.- that; 3.- that (which is also possible, but not common); 4.- which (though the hotel we stayed at is much more common); 5.- which; 6.- that/relative omitted (which is also possible, but not common); 7.- that; 8.- which; 9.- which (this is the bridge he jumped from is more colloquial); 10.- that/which; 11.- that; 12.- that (which is also possible, but quite uncommon).