Unit 2 Past simple/Past continuous

Here you can revise the grammar before doing some practice:
http://www.edufind.com/english/grammar/past_continuous.php

http://learnenglish.britishcouncil.org/ar/english-grammar/verbs/past-tense/past-continuous

http://www.ego4u.com/en/cram-up/tests/past-progressive-1

http://www.eflnet.com/grammar/pastprog.php

http://www.englishgrammarsecrets.com/pastcontinuous/exercise4.swf

http://www.englishgrammarsecrets.com/pastcontinuous/exercise1hp.swf

http://www.eflnet.com/grammar/whquestionspastprog.p

http://www.eflnet.com/grammar/whquestionspastprog.php

http://www.english-grammar-lessons.com/pastsimpleorcontinuous/exercise3.swf

http://www.english-grammar-lessons.com/pastcontinuous/exercise4.swf

http://baladre.info/english/sedaviwebfront/pastsimpcont4.htm

http://ingles.iesboliches.org/activities/grammar/tenses/SIMPLE_PAST_OR_PAST_C

http://www.english-grammar-lessons.com/pastcontinuous/exercise1.swf

http://www.english-4u.de/past_prog_ex6.htm

http://www.learnenglish.de/Games/Tenses/PastSvsPastC.htm