In spain, the results of the exams give students a clue of what major they should follow. question 2 with 1 blankmost of the majors in medicine take around 5 and 6 years. question 3 with 1 blankdue to the length of some majors, they might be taken as degrees abroad. question 4 with 1 blankthere are some majors that take longer, such as . question 5 with 1 blankit seems like mexican and colombian students tend to consider u. s. as another option.

ah, so ustedes and nosotros are my 'go-to' if i am using spanish mainly in the states? interesting, but still slightly confusing, haha."

it seems that you are a little confused about subject pronouns. yo=i, tú/usted=you, nosotros=we, ustedes=you(plural), ellos/ellas=they.

in the case of vosotros, it is an informal replacement for "ustedes" in spain. similar to using "you all" in english.

even though it is not generally used in conversation outside of spain, it is used many times in literature. i would suggest having at least some familiarity to that form, at least to recognize what it is.