En lugar de
Para dar a
para comprar
encambio de
Por
A
Usually at a quinceañera they showcase a dance they have been practicing so the answer, waltz, is the most logical choice
Top to bottom: 1. Íbamos
2. Vi
3. Era
4. Compre
5. Fuimos
6. Llovió
7. Podíamos
8. Mire
Honestly the only imperfect conjunction I could come up with is recibáis from unscrambling all the letters in the boxes