Tongue twisters

Try to do this exercise to improve your prononciation:
a. go to this excellent website: http://enjoyenglish.free.fr/english/ and click on 'Tongue twisters' on the right, then on "S/SH".
b. After listening to the karaoke twice, repeat the words at the same time and then send me your recording by clicking on the following link: http://odeo.com/sendmeamessage/Auriel