CONNECTORS
https://agendaweb.org/grammar/conjunctions-connectors-exercises.html
ARTICLES
https://www.englisch-hilfen.de/en/exercises_list/artikel.htm
http://www.myenglishpages.com/site_php_files/grammar-exercise-articles.php
PLURAL NOUNS
https://www.englishpractice.com/quiz/collective-nouns-exercise/ http://www.focus.olsztyn.pl/en-exercises-nouns.html
GENERAL QUIZ
https://www.englishpractice.com/topics/quiz/
WRITING SAMPLES ALL LEVELS
https://www.learnalberta.ca/content/eslapb/writing_samples.html
