Answer:
5. Fuí.
6. Decidí.
7. Había.
8. Decía.
Step-by-step explanation:
Because the instructions indicate that we must conjugate the verbs in the imperfect past tense, therefore we must remember that this time in sentences is used to describe actions performed in the past tense, and thus logically conjugate the one that corresponds in each sentence so that it has relationship with what is being expressed.