Articles - Intermediate
https://www.englishexercises.org/makeagame/viewgame.asp?id=8436
https://www.englishexercises.org/makeagame/viewgame.asp?id=9022
https://www.englishexercises.org/makeagame/viewgame.asp?id=71
https://www.englishexercises.org/makeagame/viewgame.asp?id=567
https://www.englishexercises.org/makeagame/viewgame.asp?id=2481
https://www.englishexercises.org/makeagame/viewgame.asp?id=2538
https://www.englishexercises.org/makeagame/viewgame.asp?id=4440
https://www.englishexercises.org/makeagame/viewgame.asp?id=2720
https://www.autoenglish.org/FCEUse/FCEUsePart2.htm#Training_
https://angielski-online.pl/cwiczenia/articles1.htm
https://usefulenglish.ru/grammar/articles-exercise-four
https://usefulenglish.ru/grammar/articles-exercise-five
https://usefulenglish.ru/grammar/articles-exercise-six
https://usefulenglish.ru/grammar/articles-exercise-seven
https://www.agendaweb.org/grammar/articles-intermediate-exercises.html