PRESENT SIMPLE EXERCISES

http://www.learnenglishlanguagewell.com/grammar/exercise-present-simple-basic-level/

http://www.autoenglish.org/tenses/gr.presim.pdf

http://www.really-learn-english.com/simple-present-exercises.html

http://www.englishexercises.org/makeagame/viewgame.asp?id=1555

http://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises?05

http://www.myenglishpages.com/site_php_files/grammar-exercise-be-present.php