Final answer:
The subject of the question is Spanish. The sentence can be completed with the verb 'salgo' in the first person singular form.
Step-by-step explanation:
The subject of the question is Spanish and the grade level is High School. The sentence can be completed by using the conjugation of the verb 'salir' in the first person singular form. Therefore, the correct completion of the sentence would be 'Yo salgo de mi casa a las siete cada mañana para ir a la escuela.'
Learn more about Completing a sentence with the correct verb conjugation in Spanish