English Level III - Past simple Verb "to be"

Please group 20107, do these exercises to deliver them the next class.

http://www.clafoti.com/imagenes10/past_was.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=5135
http://first-english.org/english_learning/english_tenses/simple_past/2/60c_questions_simple_past.htm