Answer:
say u had a very bad stomach ache in the morning (if ur a girl, u should probs say u had bad cramps as it makes it more believable) hence why u were walking very slowly to school
( I'm sorry I'm assuming) People are trapped in history is the person's good/bad memories and will always remind themselves of things they did in the past, and history is trapped in them is sort of like you're a part of the history and you can't change the fact that you're in it. Again I'm sorry if this is not correct.
Answer:
I believe it's "Although", I'm not too sure though. I hope this answers your question ;)
Explanation:
In fact, an appositive is very much like a subject complement—without the linking verb: Subject complement.