http://www.ccdmd.qc.ca/fr/exercices_interactifs/index.cgi?id=1030&action=animer
http://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-20961.php
http://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-35623.php
http://www.francaisfacile.com/exercices/exercice-francais-2/exercice-francais-19337.php