do or does in sentences and questions

Practices on do/does in sentences and questions. Click the links.
http://www.englisch-hilfen.de/en/exercises/tenses/do_does.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do2.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do3.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do_does.htm
http://www.englisch-hilfen.de/en/exercises/tenses/do_does2.htm
http://www.englishexercises.org/makeagame/viewgame.asp?id=1925
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-16257.php