Rice has always been considered important in Japan.
Voy a viajar a España y no voy a volver. Voy a comprar______
Answer : b.) un boleto sencillo
Explanation : If the trip to Spain is to stay in Spain, it is not necessary to buy a ticket to return.
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Ana me llamó ayer cuando yo estaba cocinando.
I hope this helps
An astronomer? It's astrónomo