Answer:
The correct conjugations of the verbs between parentheses are:
1. Tú <u>lavas</u> el auto antes de ir a la fiesta.
2. Nosotros <u>nos bañamos</u> antes de ir a la fiesta.
3. Para llegar a tiempo, Raúl y Marta <u>acuestan</u> a los niños antes de salir.
4. Cecilia <u>se maquilla</u> antes de salir.
5. Mis amigos siempre <u>se visten</u> con ropa muy elegante.
6. Julia y Ana <u>se ponen</u> los vestidos nuevos.
7. Usted <u>va</u> a llegar antes que los demás invitados, ¿No?
8. En general, <u>me afeito</u> yo mismo, pero hoy es un día especial y el barbero me <u>afeitará</u>. ¡Será una fiesta inolvidable!
Explanation:
<u>Almost all the conjugations of the verbs was written in Present Tense</u>, but <u>the last was written in Simple Future</u>, the reason is because in the last sentence of the eighth paragraph, uses the verb <em>"será"</em> and it refers to the future, then, the second part of that paragraph must be in future.
In some sentences must be used a form of object pronouns as <em>"se"</em>, <em>"me"</em> and <em>"nos"</em>, <u>these are used where the verb implies actions that are executed on the person who performs them</u>, for example, dress, shave or bathe, <u>if these actions are not received by the person that performs them, it's not used the object pronoun</u>.