1) If the teenager called his thoughts, he would win the competition.
2)If you learnt German, you would stay out of trouble.
3) If they took care of their pets, the poor puppy and kitten would not get into trouble.
4) If [you] didn't rely on him, we would not be late.
5) If the girl laid the table, her aunt would not be angry with her.
В четвертом пропущено подлежащее...