Useful links

If, like Matilde you can't get the PET GOLD EXAM MAXIMISER, you can visit some useful sites and practice on line. Here are some of, in my opinion, the best:
http://www.britishcouncil.org/home
http://www.britishcouncil.org/learnenglish/central
http://www.bbc.co.uk/worldservice/learningenglish/index.shtml
Have fun!