De donde vienes?
Or if you want to be specific
Que es tu nacionalidad?
B: se venden
Meaning they sell
-ar verbs: -er verbs
I - aba - ía
you - abas - ías
he/she - aba - ía
we - ábamos - íamos
you (plural) - abais - íais
they - aban - ían
Answer:
Before leaving for the party, my sister ___ in a nice dress.
Explanation:
1. got dressed
a) is the answer to the question