http://arts.uottawa.ca/writingcentre/en/hypergrammar/the-parts-of-speech
http://highered.mheducation.com/sites/0073123587/student_view0/chapter6/parts_of_speech_exercise.html
https://www.englishclub.com/grammar/parts-of-speech.htm
http://www.englishgrammar.org/parts-speech-exercise-4/
http://www.myenglishpages.com/site_php_files/grammar-exercise-parts-of-speech.php