Here you have some links to practise first and second conditioanl activities:
http://www.englishexercises.org/makeagame/viewgame.asp?id=1854
http://www.englishexercises.org/makeagame/viewgame.asp?id=6085
http://www.english-area.com/paginas/Firstandsecondconditional.htm
http://www.learn4good.com/languages/evrd_grammar/1stconditional.htm
