on,
from, or
off
Please. All are within reason ...
But NEVER say "off of". I beg you!
Sorry, but I quite like "off of", even if the "of" is superfluous or redundant. I know it's an Americanism - "It was too cold of a day to be wearing short pants" might be another (equally wrong!) example - but I just think it has a certain je ne sais quoi (even though it's wrong!).
They can from 30 weeks, and I wouldn't be surprised if it was earlier. And that's "hear" in the sense of doing something with the information.
Well, there you go. Like I said, I'd never even thought about it.