Exercices If-clauses

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

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

3- http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_statements.htm

4- http://www.englisch-hilfen.de/en/exercises/if_clauses/type_1_negation.htm