What term is used to describe the separated constituent of dye in chromatography​

Make two sentences with preferir that is about your likes and dislikes and a friends likes and dislikes about food. (2 sentences, one sentence for you and one for friend each with preferir)

¿qué te __ tus abuelos con el pastel de cumpleaños? sirve sirvo sirves sirven

Llena los espacios con las formas correctas de los verbos. "i went" would be translated as , and "i was" would be translated as