Final answer:
The missing word that completes the sentence is 'periodista', which means 'journalist' in Spanish.
Step-by-step explanation:
The sentence 'EI escribe en el periódico' translates to 'He writes in the newspaper' in English. The missing word that completes the sentence is 'periodista', which means 'journalist' in Spanish. So, the correct answer is 'periodista'.
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