D. ¡Adiós!
Adiós means “goodbye” which is more final than just saying “bye” or “Hasta luego”
Hasta pronto and Hasta ahora both mean that you will see them soon
Hasta mañana means see you tomorrow
The other guy is incorrect on number one. Number one is yo abro.
Answer:
1. está jugando
2. están leyendo
3. estás nadando
4. está comiendo
5. están estudiando
Explanation:
PRESENTE PROGRESIVO in Spanish is like "present continuous" in English.
The progressive present tense in Spanish is formed with the verb estar and with the gerund of the verb that does the action.
Form:
ESTAR + Verb root + ending -ANDO (if infinitive verb finishes in “ar”)
+ ending -IENDO (if infinitive verb finishes in “er” or “ir”)