1- http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?03
2- http://www.englishexercises.org/makeagame/viewgame.asp?id=2023
3- http://www.usingenglish.com/quizzes/77.html
4- http://suz.digitaleschulebayern.de/english/grammar/was_were1.htm
5- http://s.mound.free.fr/skyblues67/simppast/wascloze.htm
6- http://www.eflnet.com/grammar/yesnopast.php#.U9e8cfl5Png
7- http://www.montsemorales.com/gramatica/PastSimBeAffNeg.htm
8- http://www.englishexercises.org/makeagame/viewgame.asp?id=3509
9- http://learnenglishkids.britishcouncil.org/es/grammar-games/past-simple-verb-be
10- http://www.eslgamesplus.com/was-were/
