Grammar practice: ADJECTIVES or ADVERBS

http://www.ego4u.com/en/read-on/countries/usa/tour/niagara-falls#exercises

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

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

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

http://www.englisch-hilfen.de/en/exercises/adjectives_adverbs/adverb_form.htm

http://www.ezschool.com/Games/Adverbs.html

http://www.englishpage.com/minitutorials/adverbexercise.htm

http://www.englishpage.com/minitutorials/adverbexercise.htm

http://a4esl.org/q/h/9901/gc-advadj.html

http://www.myenglishgrammar.com/english/exercise-4-adverbs.html

http://www.cityu.edu.hk/elc/quiz/adjadv.htm

http://www.grammarbank.com/adjectives-adverbs-exercises.html