detector

"The teacher warned the students about the upcoming test. "

"The sudden increase in student absences is a noticeable phenomenon. "

"Smoke detectors are mandatory in public buildings."

"The scientist carefully examined the substance to determine its chemical composition. "

"The mandatory for the game requires the players to keep the disc above the painted line. "

"She is registering her daughter for kindergarten today. "

"As everyone knew, he was capable of violence when roused."

"There are a number of household devices in a kitchen such as a dishwasher, a garbage disposal, or an electric can opener."

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

"Just pull the trigger."

"The specific of her success was her dedication to studying. "

"How long has it been since your last physical?"