SMX TO BE

http://www.adelescorner.org/grammar/present_simple/to_be.html
http://www.perfect-english-grammar.com/present-simple-exercise-10.html

http://www.bradleys-english-school.com/online/flashmultiplechoice/mc_amisare.html
http://www.parapal-online.co.uk/exercises/is_are.html
http://www.ihbristol.com/free-english-exercises/test/esol-smc-the-verb-be