You've been away from the school and me for two days :) So here are some very useful grammar practice websites for your exam on Thursday ( 10.01.2013)

http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_mix.htm

http://www.englishclub.com/grammar/verb-tenses_past_quiz.htm

http://www.grammarbank.com/simple-past-tense-exercises.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=5114

http://www.isabelperez.com/happy/tenses/exercises/past_mistakes.htm

http://www.isabelperez.com/happy/tenses/exercises/past_quest1.htm

http://englishforfree.de/english_learning/english_tenses/simple_past/31_simple_past_tense_questions_exercise.htm

http://englishforfree.de/english_learning/english_tenses/simple_past/30_simple_past_questions_exercises.htm

http://englishforfree.de/english_learning/english_tenses/simple_past/21_simple_past_all_irregular_verbs.htm

http://englishforfree.de/english_learning/english_tenses/simple_past/35_simple_past_word_order_questions.htm

http://englishforfree.de/english_learning/english_tenses/simple_past/10_simple_past_regular_verbs.htm