Simple Past verb TO BE

http://esl.about.com/library/beginner/blwas.htm

http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?03

http://a4esl.org/q/h/lb/was.html

http://www.isabelperez.com/was-were-2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=5211
http://www.englishexercises.org/makeagame/viewgame.asp?id=562
http://www.englishexercises.org/makeagame/viewgame.asp?id=3509
http://www.englishexercises.org/makeagame/viewgame.asp?id=5860