She is always ready to help people in trouble because she thinks it a _________.
Not until his father died _______ what his father really meant.
— Do you like coffee or milk? —Both. But I prefer coffee _____ milk.
It was ten years ago ______ that organization was _______.
Mary kept weighing herself to see how much ______ she was getting.
If you go on doing so, you’ll _______ yourself sooner or later.