Present simple or present continuous?

Dear students of classes II G and II H here are some links with useful exercises where you have to choose either the present simple or the present continuous.
Try them!

http://www.englisch-hilfen.de/en/exercises/tenses/simple_present_progressive2.htm

http://www.englishexercises.org/makeagame/viewgame.asp?id=2429

http://www.englishexercises.org/makeagame/viewgame.asp?id=2642#a