Answer:
1) Estoy
2) Estamos
3) Es
4) Son
5) Estan
6) Son
7) Es
8) Es
9) Es
10) ?? There already is a form of ser, "es." I think it should say "Hoy es lunes, verdad?"
11) Son
12) Estoy
13) Estan
14) Son
15) Soy,
16) Soy, soy, soy
17) Eres
Explanation:
I'm assuming you know this, but the "a" in esta or estan should have an accent, I just can't do it on here.
Ser is used when something is permanent. You should use ser for characteristics, time, occupation, description, origin, and relationships/possession.
Estar is used when something is only temporary. Use it when talking about location, position, actions, emotion or condition.
