Conditionals: exercises

http://www.englishpage.com/conditional/conditionalintro.html
http://www.ego4u.com/en/cram-up/grammar/conditional-sentences
http://www.englisch-hilfen.de/en/exercises_list/if.htm#car
http://wwwedu.ge.ch/cptic/prospective/projets/anglais/exercises/condit1.htm

Finish the sentences ('comments' down here, WITH translations):
1. If you sing too loud,...
2. If they eat all the sweets,...
3. They will get good grades, if...
4. My best friend will be the champion this year, if....
5. If we ate the whole cake,...
6. If they laughed too loud,...
7. Our class wouldn't go to the field trip, if...
8. You would be my best friend, if...
9. If they had had too much coffee,...
10. If the students had had more free time,...
11. We would have studied a lot more, if...
12. She would have done better, if...