First conditional exercises

http://uczniowie.lo-zywiec.pl/~ang/cottage/files/other_grammar_points/CONDITIONAl_TYPE_I.pdf

http://uczniowie.lo-zywiec.pl/~ang/cottage/files/other_grammar_points/CONDITIONAL_TYPE_II.pdf

http://www.unrestrictedarea.com/esl/First%20Conditional.pdf

Source: http://www.eslflow.com/conditionalsrealunrealsituations.html