Answers in order of last picture submitted to the first in the question.
Be free to ask me if you don't understand something.
En la República Dominicana los invitados de la cena dejan un poco de comida en el plato. Es la costumbre. Si no comes toda la comida es ser un huésped grosero.
You would greet your professor with buenas tardes because it is used from 12pm- 5pm.