5 Underline the correct word(s).0 The man who/which waved to us

5 Underline the correct word(s).
0 The man who/which waved to us was my friend.
1 I won't go on holiday to Spain unless I'll get/I get a very cheap plane ticket.
2 That's the girl that/whose brother won a chess competition yesterday.
3 I haven't talked to her for/since ages.
4 You don't have to/mustn't wash the dishes. I can do them myself.
5 Her new mobile is the same/similar to Tom's.
6 Look! That plane over there is going to crash/ will crash into the airport!