Final answer:
The correct form to complete the sentence is 'otomábamos', representing an ongoing or repeated past action.
Explanation:
Otomábamos el metro todos los días.
In this sentence, the correct option to complete it is otomábamos, which is the imperfect form of the verb 'tomar' (to take) indicating an ongoing or repeated past action. This form is used to express a habitual or continuous action in the past.
Learn more about Verb tense selection here:
https://brainly.com/question/27406716
