Ответы
11. Ann would be a better mother if she did the house chores.
12. If Jack had money, he would travel to Europe.
13. Justin would eat more food if he wasn't sick.
14. If Ann had a degree, she would have a better job.
15. Sherlock will solve the mystery if he finds a clue.
16. If Kevin didn't have money, he wouldn't direct the film.
17. Rocky wouldn't have listened to music if he hadn't bought a new radio.
18. They will freeze if they stay outside for a long time.
19. Trevor would be happier if he had a better job.
20. Jill would read the list, if she had time.
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Почти во всех предложениях можно поставить несколько времен по смыслу, но то, что я написала - всё равно правильно. Если вы еще не изучали третий Conditional c Past Perfect (как в 17 предложении), напиши мне :)