Final answer:
The blank should be filled with the Spanish word 'viajar', which means 'to travel' in English.
Step-by-step explanation:
The blank in the sentence 'Elena va a __________ a Perú en abril' should be filled with the Spanish word 'viajar', which means 'to travel' in English. So, the complete sentence would be 'Elena va a viajar a Perú en abril.'
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