According to the context, the correct verb form in Past tense to complete the sentence is "era".
What is the Past tense?
It is a verb tense that is used to talk about events that occurred in the past, also to refer to an action that took place simultaneously with another in the past.
In the sentence "Cuando era niño me gustaba leer mucho", "era" is an indicative verb in the past imperfect that places the sentence in a habit of the past.
Therefore, we can conclude that according to the context, the correct verb form in Past tense to complete the sentence is "era".
Learn more about Past tense here: https://brainly.com/question/20107413
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