You should spend more time ______ the lessons.
Finally the English government tried in the early twentieth century to form the UK by getting Ireland __________ in the same peaceful way.
The bridge built ten years ago __________ the island __________ the mainland.
The bus __________ passengers outside the airport.
—Is the dentist at work?—I'm sorry to tell you he is on __________.
—Peter's rarely ill,__________ he?—__________. He is quite healthy.