JAMB - English Language (2006 - No. 46)
Choose the option nearest in meaning to the word underlined.
His discovery of the vaccine became a quantum leap in search for a scientific cure for the illness.
His discovery of the vaccine became a quantum leap in search for a scientific cure for the illness.
victorious battle
slow but steady step
great impovement
fast but sure step
설명
Quantum Leap: a huge, often sudden, increase or advance in something.