Answer:
Watches students at the prom to make sure there's no funny business.
What sevenยญletter word becomes longer when the third letter is removed?
Split me in half, and you get me and another me. What word am I?
What goes through a door but never goes in and never comes out?
Made of ten but two we make, When assembled others quake, Five apart and we are weak, Five together havoc wreak. What are we?
People take me on walks and I run and have fun. What am I?