Use of Articles--Exercises

Exercises
http://www.learnenglishfeelgood.com/english-article-no-article1.html

http://a4esl.org/q/h/9901/cw-articles.html

http://www.learn4good.com/languages/evrd_grammar/article_ex.htm

http://www.englisch-hilfen.de/en/exercises_list/artikel.htm