Article or no article?

Practise theuse of the articles in this link:

http://www.grammar-quizzes.com/art-4.html

http://esl.about.com/library/quiz/bl_articles1.htm

http://www.usingenglish.com/quizzes/50.html

Question Words. 4º B

Past Simple. By 4º B

Present Perfect. 4º B

Question Words. 4ºA

Present Perfect. 4º A

Past Simple by 4º A