I don't understand what you mean.
Answer:
35. Cuando tu <u>ser</u> alumno en el segundo grado, como llamarse tu maestro?
36. Durante la fiesta haber fuegos articiales.
37. Durante la fiesta todos bailar y comer.
Explanation:
(Some of these weren't the right words for these sentences ut i just used the ones you gave me)
As Spain began to colonize more and more countries those countries began to develop slang which then resulted in the slang being an everyday thing so then it became part of the language so thats why every spanish speaking country speaks differently.
Answer:
To sing is a verb and can also act as a noun
From my Argentina Semester test: The answer is Lartategui