The fact has worried people _______ the number of the deaths is still increasing.
The war ____ because neither side would give in to the other.
He found it impossible to please his boss; ____, he quit the well-paid job.
The government is doing whatever they can to ____ the bird flu from spreading.
A good diet and some moderate exercise are ____ to good health.
The meeting went on in such a friendly ____ that everything was settled ahead of schedule.