______ he referred to in his article was unknown to the general reader.
Teachers recommend parents their children under 12 to ride bicycles to school for safety.
Mother wanted to be a good provider, a role she ______ since her marriage to Father.
— Her father is very rich. —________ She wouldn’t accept his help even if it were offered.
Helping others is a habit, _______ you can learn even at an early age.
Sam _____ some knowledge of the computer just by watching others working on it.