Oído.
Since the infinitive verb is oír, which stems ends with a vowel (i in this case), we replace the inifinitive part ir with oído. Remember to include the accent since its an irregular form.
1.Vaya a La Pedriza
2.Fiestas en la Ribera del Duero
3.Toma el Tren de la Fresa
It refers to the tonic sylable (silaba tónica)
sol (sun) Its a word "aguda"
ra-tón (mouse) Its a word "llana" or "grave"
Mé-xi-co Its a word "esdrújula"
cán-ta-me-lo (sing it to me) its a word "sobredrújula"
Hope this helps u :)
Answer:
it the last option "Buenos dias, profesora. como esta?"
