Comparative and Superlative Exercises

http://www.englishexercises.org/makeagame/viewgame.asp?id=6009
https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises
http://www.english-4u.de/comparison_ex4.htm
http://www.agendaweb.org/exercises/grammar/comparison/comparative-superlative-2
http://www.myenglishpages.com/site_php_files/grammar-exercise-grammar-comparatives-superlatives.php
http://www.learnenglish-online.com/grammar/tests/superlativecomparative.html