retention

"He is an unusual individual."

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

"Every people have the right to preserve its identity and culture."

"The confinement of the sick child to his room prevented him from attending school. "

"The historical romance novel was a bestseller in the bookstore. "

"His head made an impression on the pillow."

"The student's tears were involuntary; she couldn't help crying when she saw the sad movie. "

"The company is retaining its best employees by offering them better salaries. "

""The historian spent years remembering the fragmented details of the ancient civilization, piecing together their lost culture." "

"a successful use of medicine;  a successful experiment;  a successful enterprise"

"After much consideration, I have decided to stay."

"The student withheld the textbook from the library, refusing to return it. "