Great as Newton was, many of his ideas _______ today and are being modified by the work of scientists of our time.
A car’s tires should be ______ regularly to ensure their safety.
Eventually I reached the point _____ I was beginning to enjoy my work.
By the time he realizes he _____ a mistake, it’ll be too late for him to change his mind.
The prime minister said that ______ students lack nowadays is devotion and patience.
The poem _____ in tomorrow’s literature class is from a collection of classic works.