Create 10 sentences using the verbos de cambio radical in both present and preterito

Can somebody me out with this spanish question? completa la oración con la voz pasiva con se. used cars for sale. carros usados. (the answer is not usa los or venta de)

El estudio del precio de la papaya corresponde a la parte de la economia llamada

Answer the following questions using 6 to 8 complete spanish sentences. what is your opinion of bullfighting? if you were in mexico or spain, would you attend a bullfight? why or why not? are you aware of any controversial traditions in your culture? how is that tradition similar to or different from the tradition of bullfighting?