—Excuse me, visiting hours are over.It' s time for you to leave.—I' m sorry, I didn't know the time or I ______ earlier.
Your performance in the exam didn’t reach the required standard ---, you failed.
In the past ,the miners had to be extremely to bear the uncomfortable conditions at mines.
A block of flats are being to make room for a supermarket.
They had their shabby houseand sold it for a big profit.
Next week we’ll pay a visit to the Great Wall, so in our absence pleaseour pet dog.