I can’t go to the cinema with you because I _______ stay here until my mother comes back.
Paula seldom comes late for school, _______ ?
I still remember the college and the teachers ___I visited in London years ago.
______, his leg got better and he could walk with a walking stick.
Tom is often made ______for twelve hours a day by the boss.
—How long have you ______ the book ? — For a week.