How would you tell someone that you used to be disobedient? in spanish

Choose the correct form of the imperfect for each given subject. nosotros /escribir a. escribía b. escribias c. escribiamos d. escribían franco/comer a. comías b. comían c. comia d. comiamos yo/cantar a. cantata b. cantabas c. cantabamos d. cantaban

Is anyone able to ? i am so confused. this sheet is about irregular preterit verbs and direct object pronouns in spanish.

What kind of molecules is being released by cellular respiration and used in photosynthesis?