Answer:
Before leaving for the party, my sister ___ in a nice dress.
Explanation:
1. got dressed
a) is the answer to the question
Did you try google translate? If you did then try doing AR-,IR-, and ER verbs the conjugation to the AR verbs are o as a amos an. IR conjugation is o es e imos en. ER conjugation o es e emos en.
Hope this helps