Question

El mes pasado, yo ____________ los lunes, miércoles y viernes.

Answer 1

Hmm...well, just about anything can fit there. What (verb) did you do last month on Mondays, Wednesdays, and Fridays?
work? 
sports? 
just be sure to use the imperfect tense (past). 
-ui
-aba

Answer 2

Well, almost anything can go here as long as it is a verb. What did you do last month on Monday, Wednesday, and Friday? There is your answer!