It means one "doesn't have too" or "you should not"
Depends on the context
2.Mis hijos son perezosos. would be the one it makes more sense.
Answer:tú
Explanation:
Because it has you in it and is talking about you(this might be right )
1.Averiguaste
2.Finanzas
3.Clasificados
4.Se casó
5.Sucedió
6.Dio un discurso