Answer:
1. concert = noun - meeting
2. ran = verb - slept
3. quickly = adverb - early
4. fast = adjective - Veteran
5. and = conjnuction - or (However, "and" is still the most appropriate conjunction for the sentence.)
6. for = preposition - at ("For" was not used as a coordinating conjunction but as a preposition.)
7. during = preposition - at
8. Hey! = interjection - Yo!
9. they = pronoun - he
10. fairly = adverb - quite
11.; practice = verb - perform
12. awesome = adjective - wonderful
13. oldest = adjective - youngest
14. check = verb - count
15. themselves = pronoun (This is an example of intensive pronoun) - by themselves ("By" was just added to "themselves because "themselves" is the only appropriate intensive pronoun for students. if the subject "students" will be changed, then we can also change the intensive pronoun.)
