Answer:
Paseamos
Explanation:
First, let's translate the sentence:
Anteayer, mi hermano y yo ___________ en el parque = The day before yesterday, my brother and I ___________ in the park.
So, the subject in the sentence is "My brother and I = We". Now, let's see how the verb "pasear" is conjugate in simple present tense:
Pasear:
(yo=I) paseo
(tú=you) paseas
(él=he;she=ella) pasea
(nosotros=we) paseamos
(vosotros=you) paseáis
(ellos=they) pasean
Hence, the correct verb in this case is "paseamos":
Anteayer, mi hermano y yo paseamos en el parque = The day before yesterday, my brother and I walked in the park
