merciless

""The teacher marked specific points on the map where we needed to label the cities." "

"He is a student of life."

"She took mercy on him and quit embarrassing him."

"The teacher is grading the students' math tests. "

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

"My younger brother counted the evens in his math homework. "

"His constant criticism cruelly spoiled her chances of getting a good grade on the project. "

"The teacher's pitiless grading policy meant many students received failing marks. "

"All he had to show for four years of attendance at college was a framed piece of paper."

""The doctor ordered some exams to check my health." "

"The child's small was sore after carrying his heavy backpack to school. "

""Everyone makes mistakes when they are learning something new." "