Answer:
1. Las chicas pudieron divertirse.
2. ¿Conocíste a los recién casados?
3. No pude encontrar a Patricia.
Explanation:
In this exercise you have to change the tense of the verbs from "tiempo presente" to "pretérito indefinido".
For example:
In English the "past tense" is similar to "preterito indefinido" in Spanish:
1. Girls could have fun.
2. Did you meet the newlyweds?
3. I couldn't find Patricia.