Czy wykonawca czynności jest niezbędny w poniższych zdaniach? Wpisz w odpowiedzi numery zdań, w których wykonawca (by + agent) jest zbędny.

1. I was taught to ride a bike by my dad.
2. This picture was painted in 1845 by someone.
3. Pope John Paul II was admired and respected by everyone in the world.
4. She was given her laptop by her grandparents.
5. Paper was first made by the Chinese.