I was taught to call them yo -go irregulars because the verb's stem ends with -go in the yo (I) form
Ex: Yo Tener(To have) becomes "Tengo"
Yo Venir(To come) becomes "Vengo"
Hope this helps
Answer: Mensualmente (A)
Explanation: She is asking that how frequent Cristobal pays his bills, but the only answer to choose is A so...
Hope this works :).
Answer: las peliculas de Avengers son genero dramatico
Explanation: