Não gosto lá muito de cábulas (mesmo mentais), mas pronto... é por uma boa causa. 
Ora aqui vai:
A
1) She's a famous American film star 
who lives in a big mansion.
2) They live in an old house 
which has got a nice garden.
3) He's a film director 
whose wife is an actress.
4) A waiter, 
who told me that she was ill, answered the phone.
B
1) Who are those girls? Do you know 
them?
2) She fell down the stairs and hurt 
herself.
3) He can't carry his briefcase by 
himself. It's too heavy.
4) George, look at that girl in blue. She's looking at 
you.
5) The students behave 
themselves in class, but not in the playground.
C
1) If I go to Hollywood, I 
will send you a postcard
2) You 
will be surprised if you go to Universal Studios.
3) If I went to California, I 
would like to visit Disneyland.
4) If my best friend 
lived in California, I'd visit her.
5) If I had the time, I 
would go to Beverly Hills