A female speaker wearing a gray jacket , a dark scoop necked top with a dark knee length skirt is presenting to a group using a computer to present as well as a microphone at the podium .
Chances are slight that a college professor is giving a lesson in a big classroom .
Chances are slight that a college professor is giving a lesson in a big classroom .
It is highly likely that a college professor is giving a lesson in a big classroom .
A college professor is giving a lesson in a big classroom .