1. Correct answer:
Answer for blank 1: trabajaba
The imperfect is used to talk about actions that were in progress in a moment in the past. So we must use the imperfect here. Since trabajar is a regular verb, for the imperfect (first person singular) remove the ar ending and add aba to the end of the word. Finally:
Imperfect:
Yo trabajaba mucho en la tienda todos los días.
2. Correct answer:
Answer for blank 1: estudiaba
As in the previous sentence, estudiar is a regular verb, so you must take away the ar ending and add add aba to the end of the word. Finally:
Imperfect:
Yo estudiaba mucho en la biblioteca todos los días
