Final answer:
The correct imperfect form of the verb in the sentence is 'tenía'.
Step-by-step explanation:
The correct imperfect form of the verb in the sentence is 'tenía'. The original sentence 'El panadero tuvía que hacer pan en la noche.' contains a spelling error. The correct form should be 'El panadero tenía que hacer pan en la noche.' The verb 'tenía' is the imperfect tense of the verb 'tener' which means 'to have'.
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