Si el test quieres aprobar, los verbos tienes que conjugar!

Preterite tense of -ar verbs

Use the Preterite tense when you are talking about actions or events that were completed in the past. Form the preterite tense of a regular -ar verb by removing the last two letters from the basic form of the verb and attaching the endings shown.

Preterite Tense

LAVAR

Yo lavé

Tú lavaste
Él/Ella/Usted lavó 
Nosotros lavamos

Vosotros/tras lavasteis

Ellos/Ellas/Ustedes lavaron