Final answer:
The appropriate word to fill in the blank is 'nada', which means 'nothing' in English.
Step-by-step explanation:
The appropriate word to fill in the blank in the sentence 'Yo limpio la casa' is nada, which means 'nothing' in English. So, the correct sentence would be 'Yo no limpio nada la casa.' This indicates that the person does not clean anything in the house.
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