Final answer:
The appropriate imperfect form of the verb 'dormir' to complete the sentence is 'dormíamos'.
Step-by-step explanation:
In the given sentence, the appropriate imperfect form of the verb 'dormir' to complete the sentence is 'dormíamos'. The sentence 'De pequeños, nosotros dormíamos con nuestros padres a menudo' translates to 'When we were little, we used to sleep with our parents often.' The verb 'dormíamos' is the imperfect form of the verb 'dormir' used to indicate an ongoing or repeated action in the past.
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