First conditional exercises

http://www.elt-els.com/2014/04/conditional-sentences-first-conditional_23.html
http://www.english-grammar-lessons.com/firstconditional/exercise1.swf
http://web2.uvcs.uvic.ca/courses/elc/studyzone/330/grammar/1cond1.htm
http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_mix2.htm
http://www.impact-english.com/members/Grammar_Practice/Always/test-grammar/gr_prac_form-Cond1.htm