Passive Voice Practice

http://a4esl.org/q/h/vm/active-passive.html

http://www.usingenglish.com/quizzes/46.html

http://eslus.com/LESSONS/GRAMMAR/PASSIVE/Gramc.htm

http://esl.about.com/library/quiz/blgrquiz_passive1.htm

http://www.eslgo.com/quizzes/raiderspassive.html

http://www.nonstopenglish.com/exercise.asp?exid=921