Pedro es mexicano Olivia es española Mis amigos son argentinos Sofia y margarita son chilenas El es cubano Ella es cubana Nosotros somos americanos Ellos son venezolanos Ellas son peruanas Nosotras somos puertorriqueñas
Basically what the question is asking is to change the pronouns so that they make sense in the sentence. Either switch the pronouns to be past or present tense to best fit the sentence.
