Answer:
La escuela primaria parece facil.
Explanation:
I know spanish just trust me
Answer:
Tú
Explanation:
Tú is the only one of those four that is informal.
Tú is informal "you", usted(es) is "formal you (all)".
Ellos is "they".
You could use multiple words in that blank. For example:
Para el postre, quisiera pastel.
Para el postre, quisiera helado.
Doctor, no me siento bien. Creo que estoy enfermo.
(Doctor, I'm not feeling well. I think I'm sick)