
Past tense excercises
http://www2.cambridge.org/interchangearcade/listtypes.do?level=1&unit=7&stage=1
Past tense exercises (2)
http://www2.cambridge.org/interchangearcade/listtypes.do?level=2&unit=1&stage=1
Simple Past Tense Quiz
http://www.englishclub.com/grammar/verb-tenses_past_quiz.htm
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