The doctor must be _______ 24 hours a day, 7 days a week in the boarding school.
Linda went to a party with a girl, _____ favorite hobby is collecting stamps.
I thought her nice and honest ____ I met her. But as time went on, I knew that she was very selfish.
He commanded the students _____ the classroom before he returned.
Do you remember those days _____ we spent along the seashore very happily?
His inability to speak English put him at a _____ at the international meeting.