Final answer:
The student is asking about the correct preposition to express 'to pay for' in Spanish.
Step-by-step explanation:
The subject of this question is Spanish, which falls under the World Languages category. The student is asking about the preposition that should be used to express 'to pay for' in Spanish. In this case, the correct preposition is 'por'. So, the correct sentence would be: '¿Vas a pagar mucho por los boletos?'
Learn more about Prepositions in Spanish