. — What happened over there?— They argued______ the waiter______ the price of the meal.
Knowing her son was out of danger, the mother sighed _________ relief.
The building was completely _________ by fire.
—Why are they _________ the forest? —They are _________ some criminals.
He had his camera ready _________ he saw some-thing that would make a good picture.
We mustn't do anything that _________ the interests of the people.