PRACTICE: FIRST CONDITIONAL

http://www.englishexercises.org/makeagame/viewgame.asp?id=3226

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises

http://www.englishmedialab.com/Quizzes/preintermediate/first%20conditional.htm

http://www.impact-english.com/members/Grammar_Practice/Always/test-grammar/gr_prac_form-Cond1.htm

https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercises?02