mostraron
-they showed
The word mostraron is the preterite form of mostrar in the third person plural.
See the full mostrar conjugation

mostrar

Want to Learn Spanish?
Spanish learning for everyone. For free.
SpanishDict Premium
Have you tried it yet? Here's what's included:
Cheat sheets
No ads
Learn offline on iOS
Fun phrasebooks
Learn Spanish faster
Support SpanishDict