ELTC Argentina

Used to

http://www.megaupload.com/?d=T54MCAKU
http://www.myenglishpages.com/site_php_files/grammar-lesson-used-to.php
http://www.englishgrammarsecrets.com/usedto/menu.php
http://www.inglesmundial.com/A8/grammar.htm

Exercises
http://www.learn-english-today.com/lessons/lesson_contents/used-to_to-be-used-to_ex..htm
http://www.usingenglish.com/quizzes/115.html
http://www.usingenglish.com/quizzes/326.html
http://www.englishexercises.org/makeagame/viewgame.asp?id=2448
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-19800.php
http://perso.wanadoo.es/autoenglish/gr.used.i.htm