Form 8c. Conditionals Type I

For practicing:
https://www.ego4u.com/en/cram-up/tests/conditional-sentences-1;
https://www.ego4u.com/en/cram-up/grammar/conditional-sentences/type-1/exercise;
http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_statements.htm;
http://www.englishgrammar.org/type-1-conditional-sentences/.