pre test 

https://www.usingenglish.com/quizzes/242.html

tests

http://www.softschools.com/quizzes/grammar/adjectives/quiz328.html

https://www.ego4u.com/en/cram-up/grammar/adjectives-adverbs/adjectives/exercises

http://anthonyhalderman.com/english/compsup.htm

https://www.proprofs.com/quiz-school/story.php?title=degree-of-comparison-quiz-1

http://www.eflnet.com/grammar/compsupadv1.php