Multiple Choice Exercise for the Conditionals

http://www.impact-english.com/members/Grammar_Practice/Always/test-grammar/gr_prac_use-Cond.htm
http://www.englisch-hilfen.de/en/exercises/if_clauses/multiple_choice3.htm
http://www.myenglishpages.com/site_php_files/grammar-exercise-conditionals.php