FREQUENCY ADVERBS

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

http://www.myenglishpages.com/site_php_files/grammar-exercise-adverbs-frequency.php#.VIkb4hs5D6U

http://www.agendaweb.org/grammar/adverbs-exercises.HTML

https://elt.oup.com/student/solutions/elementary/grammar/grammar_02_012e?cc=mx&selLanguage=en

http://www.englishexercises.org/makeagame/viewgame.asp?id=1400

http://www.ecenglish.com/learnenglish/lessons/frequency-adverbs

http://www.grammar-quizzes.com/adv_frequency.HTML

https://www.englishclub.com/grammar/adverbs-frequency_quiz.htm

http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-28491.php

http://www.bastrimbos.com/Hotpotatoesfiles/advfreq2.htm

http://learnenglishkids.britishcouncil.org/en/grammar-games/adverbs-frequency