If I had more practice, I would make it even more master!

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond.htm

http://www.perfect-english-grammar.com/second-conditional-exercise-1.html

http://web2.uvcs.uvic.ca/elc/studyzone/410/grammar/2cond1.htm

http://perso.wanadoo.es/autoenglish/gr.con2.p.htm

http://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-2/exercises?02

http://www.better-english.com/grammar/condit23.htm

http://www.better-english.com/grammar/secondconditional1.htm