salesmanship

"My knowledge of history helped me understand the current political situation better. "

"The student earned a good grade on the test by studying hard. "

"The judge skills the competitors based on their performance and technique. "

"The mayor's office held a special ceremony to honor the city's firefighters. "

"My uncle invested in a corporate bond issued by a large tech company. "

"The teacher convinced the students that the Earth revolves around the sun, using diagrams and explanations. "

"My favorite position in the classroom is near the window. "

"The contest was long, but the Romans finally conquered."

"The new sports car was incredibly expensive, costing more than my entire year's savings. "

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

"The salesman at the electronics store showed my dad several different laptops. "

"an impressive movie"