Yo pague en D. la recepcion.
This means - I paid at the reception
A. La llave is a key, B. el ascensor is an elevator, C. el balcon is balcony.
Answer: Cuestan.
Explanation: Cuanto means How much in english, so the question is asking how much those books are going to cost. Whenever you see a Cuanto in a question like that, assume it's talking about a number of something, or money. So Cuestan means cost, in the terms of "How much does this item cost?".
Simply pull of the "S" that leaves you will La Mochila
A- una persona no c que cosa
B-una persona nadando en al piscina
C-un jugador de pelota en línea para una foto
D-la familia va a skiar juntos
