Past Simple, Past Perfect, and Past Continuous

http://www.miguelmllop.com/practice/intermediate/verbtenses/pastsimplepastperfectsimplecontinuous1.htm

http://www.englishteststore.net/index.php?option=com_content&view=article&id=10560:Past-Simple---Past-Continuous---Past-Perfect---Test-01&catid=283:basic-grammar-past-simple-continuous-perfect&Itemid=391

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