Form 4ab. Past Simple. Regular verbs

For practicing: http://www.englishexercises.org/makeagame/viewgame.asp?id=4061; http://www.agendaweb.org/verbs/past-simple-regular/index.html; http://www.adelescorner.org/grammar/past_tense/past_regular.html; http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_statements.htm; http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_negation_sentences.htm; http://first-english.org/english_learning/english_tenses/simple_past/2/06_english_simple_past.htm.