Final answer:
The correct verb tense to use in this sentence is 'seemed'.
Step-by-step explanation:
The correct verb tense to use in this sentence is seemed.
When we say 'It was dark out,' we are referring to a specific past moment, so we need to express the situation in the past tense. In this case, the action of the house feeling extra spooky should also be in the past tense.
Example: 'It was dark out, so the house seemed extra spooky.'
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