8th grade A-B/ First conditional

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

http://www.learnenglishfeelgood.com/grammar-firstconditional1.html

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

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

http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_mix3.htm

http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_mix2.htm