----- how _____ are you driving now?-----A hundred miles an hour.

To children, good habits do not come        , so parents and teachers need to be their role models.

33. The employees have not been paid _______ since the new manager took over this company last month.

.．As is often pointed out, knowledge is a two-edged weapon which can be used_____________for good or evil.

Professor White has written some short stories, but he is________known for his plays.