Answer:
-Gastaron.
Explanation:
In this exercise you have to complete the blank with the correct verb form according to the subject.
For example:
The subject "Mis primos" can be replaced by the pronoun "ellos" (they).
- Él gasta.
- Tú gastaste.
- Ellos gastan /gastaron.
So as you can see there are only two options "gastan" and "gastaron". However, the correct verb form would be "gastaron" because of the adverb "ayer" (yesterday) that indicates past tense.
So the correct version would be:
- Ayer, mis primos gastaron 15.000 pesos.
