a couple of sentences to check:)

[looker]

1.My friend would like his parents to stay in your hotel
2.I'd also want to know
3.on that day I met people with whom I would stay for three years in this high school
4.Parents of my friend are going to visit our town.
5.waiting for answer (formal/informal?)
6.there are more teenagers who have no such a chance
7.Children devastate football stadiums because they're drunk. So far nothing seems to be changing.

problematic phrases are italicized :)thx

[Noego]

1.My friend would like his parents to stay in your hotel
2.I'd also want to know (I would also want to know)
3.on that day I met people with whom I would stay for three years in this high school
I would say:
"On that day, I met people with whom I stayed for three years during high school."

4.Parents of my friend are going to visit our town.
I would say:
"My friend's parents are going to visit our town."

5.waiting for answer (formal/informal?) Not too sure what you mean on this one.

6.there are more teenagers who have no such a chance:(
This sounds really awkward to me. Can't explain why right now though. I'll leave this to the experts.
7.Children devastate football stadiums because they're drunk. So far nothing seems to be changing.
I would say:
"So far, nothings seems to have changed."