Clase...

http://www.manythings.org/vocabulary/lists/e/words.php?f=aches_and_pains

http://www.learnenglish.de/vocabulary/body.htm

http://www.ego4u.com/en/cram-up/grammar/past-progressive/exercises

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

 http://www.esl-lab.com/guide.htm