Irregular verbs

Exercises about irregular verbs:

http://enjoyenglish.free.fr/english/college/pageshtm/holiday.htm
http://www.anglaisfacile.com/exercices/exercice-anglais-2/exercice-anglais-58156.php
http://s.mound.free.fr/skyblues67/simppast/SimplePasteasy.htm
http://s.mound.free.fr/skyblues67/simppast/SimplePastdiff.htm
http://s.mound.free.fr/skyblues67/simppast/top30.htm
http://s.mound.free.fr/skyblues67/simppast/IrregVerbsQuiz-1.htm
http://s.mound.free.fr/skyblues67/simppast/IrregVerbsQuiz-3.htm
http://s.mound.free.fr/skyblues67/simppast/irrvbsxwd1.htm