The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.
The news reporters hurried to the airport, only___________the film stars had left.
“We can’t go out in this weather,”said Bob, out of the window.
I was really anxious about you. You________home without a word.
____ from his appearance, he must be from the north.
Our town has dozens of factories, ____ several sawmills.