ELTC Argentina

‘used to + infinitive’ and ‘be/get used to’

https://learnenglish.britishcouncil.org/en/grammar-reference/used-infinitive-and-beget-used 

http://www.grammar-test.englet.com/used-to-ing  

http://speakspeak.com/resources/english-grammar-rules/various-grammar-rules/be-used-to-get-used-to-used-to 

http://www.myenglishpages.com/site_php_files/grammar-lesson-used-to.php#.U684Y7GmW7c 

 http://www.anglaisfacile.com/exercices/exercice-anglais-2/exercice-anglais-18091.php

http://www.carmenlu.com/third/grammar/usedto.html 

http://www.perfect-english-grammar.com/used-to-exercise-3.html