7. Did you meet a lot of people in Mexico?
8. Were you able to make the trip?
9. Who did you travel to Mexico with?
10. Did you have any problems during the trip?
11.What did you bring with you?
12. How was the trip?
B, haces because tú would make the ending es.
Answer:
La óptica es el estudio científico de la vista y el comportamiento de la luz, o las propiedades de transmisión y desviación de otras formas de radiación.
