First of all, let's review some concepts that are given in this problem:
In Spanish, the preterite tense (el pretérito) is used to describe actions completed at a point in the past. So the Spanish preterite is not used to describe regular or continuous actions in the past with no specific beginning or end. In that case, we use the imperfect. Therefore, we use the preterite to talk about completed actions in the past. So, it is used to talk about beginnings and ends, things that occurred on specific dates or days, at specific times or during specific time periods, and events in a sequence. There are two forms in this verbal tense, namely: Regular Imperfect Forms and Irregular Imperfect Forms. The rules are shown in the first and second Table below.
On the other hand, in Spanish, the simple present tense (el presente or el presente de indicativo) is used to talk about habitual actions, routines, things happening now or in the near future, universal truths, facts, hypotheticals, lapses of time, and for ordering in restaurants and stores. There are both regular and irregular indicative forms.
So solving this exercise:
1. La profesora miró a los alumnos. (mirar)
2. Ella tocó la guitarra anoche. (tocar)
3. Julia y Marcos miró la televisión anoche. (mirar)
4. Yo visité a mi abuela la semana pasada. (visitar)
5. Usted llamé a la tienda por teléfono. (llamar)
6. Tú llevaste una falda roja. (llevar)
7. Lolita habló con Pablo en la fiesta anoche. (hablar)
_______________________________________________________
Change this verb from the present tense to the preterite tense.
8. Mi familia baila
Mi familia bailó
9. Yo hablo
Yo hablé
10. Yo mando
Yo mandé
11. Nosotros pagamos
Nosotros pagamos
12. Tú lavas
Tú lavaste
13. Ella lava
Ella lavó
14. Ramón llama
Ramón llamó
_______________________________________________________
Fill the blank with the preterite tense of the verb in parentheses.
15. Yo empecé a las cinco y media. [empezar]
16. Nosotros no empezamos a las nueve. [empezar]
_______________________________________________________
Change this verb from the present tense to the preterite tense.
17. Ella empieza
Ella empezó
18. Yo pago
Yo pagué
19. Yo saco
Yo saqué
_______________________________________________________
Fill the blank with the preterite tense of the verb in parentheses.
20. Yo saqué una buena nota. [sacar]