janitor

"Regular maintenance of the school's computers ensures they are always working properly. "

"The building of the bridge will be completed in a couple of weeks."

"Members of the public may not proceed beyond this point."

"Do you need a gift for that special someone?"

"Be sure to finish your homework before you go to bed!"

"The doorman at the apartment building greeted my father and took his package. "

"Check the oil in your car once a month."

"Everyone in the class needs to bring their textbook to the first lecture. "

"Often used to imply membership of a large class."

"You should knock before you enter, unless you want to see me naked."

"The students rushed through the hallways between classes. "

"Can you clean the windows today?"