TO BE EXERCISES.

http://www.kico4u.de/english/uebungen/5klasse/becon.htm

http://michel.barbot.pagesperso-orange.fr/cap/be_have/exo0.htm

http://www.bradleys-english-school.com/online/MultipleChoice/verbtobe.html

http://www.eclecticenglish.com/grammar/PresentSimpleToBe1A.html

http://www.adelescorner.org/grammar/present_simple/to_be.html

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

http://www.englishmaven.org/HP6/To_Be_Exercise2.htm