on

"In math class, we learned that multiplication is a quick way to add the same number many times. "

"Responsibility is a heavy burden."

"Instruction will be provided on how to handle difficult customers."

"The teacher will appropriate the new lesson plan to the students' current level of understanding. "

"It is inappropriate to burp at a formal dinner."

"The farmer's subsistence depended on a good harvest. "

"The continuation of the project required everyone to stay late. "

"The coffee maker is functioning properly this morning, so I can have my coffee. "

"After losing the championship game because of a bad call, the angry coach muttered an imprecation against the referee. "

"What is the pronunciation of "hiccough"?"

"Because she was menstruating, she accidentally stained her pants. "

"the performance of an undertaking or a duty"