Final answer:
The blank can be completed with the Spanish word 'periódico' which means 'newspaper' in English.
Step-by-step explanation:
The blank in the sentence can be completed with the Spanish word 'periódico'. This word means 'newspaper' in English. So, the sentence would read 'A mi mejor amigo le gusta leer el periódico en la escuela.'
Learn more about Completing a sentence in Spanish