Iam very confused with preterite and imperfect !

Cual es el verbo sujeto y adjetivo de las siguientes oraciones. 1 la disciplina es importante en la institución 2 es la decisión mas difícil que he debido tomar 3 la adolescencia es una etapa de la vida 4 recibí con honestidad el titulo 5 percibí su olor a lo lejos

Fill the blank with a la, a las, a los, or al. carlos no en el parque.

What are some things that your friends did this week? write 5 complete spanish sentences describing what they did. don't forget to conjugate your verbs in the preterite tense! (use only -er verbs) pay attention to (a) use of correct preterite form of the verb, (b) appropriate vocabulary usage, and (c) overall quality of each response. *note: this is a practice activity. completing this activity will not only prepare you for future tests and assessments but, more importantly, it will enhance your language ability. this activity will not count towards your grade.