One way to understand thousands of new words is to have________ good knowledge of basic word formation.
I am writing to express my _______ for the safety of children travelling on school buses, especially those on high-risk and highway-speed routes.
—____ you got to know my telephone number? —Through a friend of yours.
It’s amazing that Mike should get such good marks while he does only ________ the others.
It was not until Mum agreed to buy him a computer, _______ was his favorite, _______ the boy promised to study hard.
_______ good use of learning resources such as the website and library, and you will make great progress.