. Duty is an act or a course of action that people you to take by social customs, law or religion.
. He looked rather untidy as there were two buttons _____ from his coat.
Lawyers often make higher _____ for their work than they should.
The workmen made so much _____ that Mrs. Walker had to spend three days cleaning up afterwards.
They have held several meetings to _____ next year's production plans.
How can we get this language point _____ to the students.