Answer:
El is the answer since chico is just one person. And it has o for masculine.
If it has a correct gender specific noun. If its singular or plural. Irregular verbs. The fact there is two different verbs. Past tense or current. Verb of change. Spanish prepositions. Direct and indirect pronouns. The word gustar.
Pablo: Yo puse: número treinta y cinco calle Libertad. <span><span>estar </span>en Madrid.
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