Duty is an act or a course of action that people _____ you to take by social customs, law or religion.
—— How was she ? —— Terrible. She was shocked ______ what happened to her son.
There aren’t enough balls for ________; you have to share them.
In the early days of radio, those who reported the news were ________ to speak with standard dialects.
—— Jack, go and clean the blackboard. ——Why ______? I’m not on duty today.
More than one kind of English ________ all over the world.