I'm afraid I won't be available. I __________ a friend off at 3 o'clock this afternoon.
Not until I read your letter ________ the true state of the affairs.
________ going to the program If You Are the One,she knew she had to be there or her mother would be unhappy.
—Mary,turn the heat down,________ burn. —OK.Mum.
Seldom ________ TV when he studied in senior high school.
Everything,unless otherwise ________,will go on as planned.