nonempty

"He is a student of life."

"My friend told me there was something in the box, but I didn't know what it was yet. "

"My daughter's teacher is very kind and helpful. "

"Letters are the elements of written language."

"The box containing my old toys was stored in the attic. "

"They will not submit to the destruction of their rights."

"The partial derivative of the family's monthly expenses with respect to food costs is relatively high. "

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

"Her voice was distinct despite the heavy traffic."

"What is your question?"

"My parents are ensuring my younger sister gets to school on time every day. "

"My sister studied hard for the exam, thereby achieving a good grade. "