Second Conditional

Exercises
http://www.perfect-english-grammar.com/second-conditional-exercise-1.html
http://www.englishgrammarsecrets.com/secondconditional/exercise1.html
http://www.englishgrammarsecrets.com/secondconditional/exercise3.html
http://www.learnenglish-online.com/grammar/tests/2ndconditional.html
http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond1.htm