Answer:
51
Explanation:
Yo <em>he</em><em> </em><em>lavado</em> los platos!
You need to use in this case the Preterito Perfecto (like present perfect) because it's an action that you have made in the past, probably a few moments ago.
El libro
El hombre
El profesor
El sombrero
Chemistry
I don't have an explanation I'm just fluent in spanish
D
I think you answer is d