________ is often the case with old people, my grandfather is fond of doing morning exercise.
.– She was in clas on Friday afternoon, but no one has seen her since.---She _____ an accident.
The city ____ by an army of 600 men was difficult to take.
Two fifths of the police _____ in the school near the town.
.We would like to go and thank him ourselves, but we _____ out his address yet.
Was it because it snowed last night ____ he didn’t come?