1. 1. Passive Voice & Past Particles ESL Grammar Game - Football (Soccer) Game
http://www.englishmedialab.com/GrammarGames/football/passive%20voice/passive%20voice.
html?zoom_highlight=Passive+Voice
2. Grammar Games Active vs. Passive Voice and Past Participles- Basketball Fun Game
http://www.englishmedialab.com/GrammarGames/basketball/active%20vs.%20passive%20voic
e/active%20vs.%20passive%20voice.html?zoom_highlight=Passive+Voice
3. English, ESL Grammar Test : Passive voice and product material
http://www.esltower.com/GRAMMARQUIZ/preintermediate/fill%20in%20what%20is%20it%20
made%20of.htm?zoom_highlight=Passive+Voice
4. Active and passive voice exercises with answers http://www.e-grammar.org/passive-voice/
5. Quiz: Passive Offset http://www.usingenglish.com/quizzes/46.html
6. Quiz: Active Voice and Passive Voice http://www.cliffsnotes.com/study_guide/Quiz-Active-
Voice-and-Passive-Voice.topicArticleId-251279,articleId-251222.html
7. Passive Voice http://www.ego4u.com/en/cram-up/grammar/passive
8. http://www.bbc.co.uk/worldservice/learningenglish/grammar/learnit/learnitv65.shtml
9. http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1643_gramchallenge14/
10. http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/92_gramchallenge12/