Question

mi hermano ______ (dormir) muy bien anoche
options: dormió, dormiste, durmió, dormí
después de jugar, mi mamá nos ____ (servir) sandwiches de jamón y un poco de jugo de naranja
options: servió, sirvió, servimos, sirvimos
la chica ______ (repetir) todo lo que le dijeron
options: repitió, repetiò, repeti, repituele

Explanation:

1. For the first question: The subject is "Mi hermano" (third-person singular masculine), and the action happened last night (preterite tense). The correct preterite conjugation of dormir for this subject is durmió.
2. For the second question: The subject is "mi mamá" (third-person singular feminine), preterite tense. The correct preterite conjugation of servir for this subject is sirvió (the marked option is incorrect).
3. For the third question: The subject is "La chica" (third-person singular feminine), preterite tense. The correct preterite conjugation of repetir for this subject is repitió (the marked option is correct).

Answer:

1. durmió
2. sirvió
3. repitió