You see were it had the “()” and it has a word? For example number three, the word in the parentheses is “hablar”, you will use the right grammar to finish off the sentence. So for number three you will put “Mis amigos y yo hablamos en clase”
1. leerían
2. decidirías
3. decidiríamos
4. sabría
hope it helps!
Answer: gastaron (Uds form and preterite)