It is necessary ___ the magazines in time.
If we ________ a table earlier, we wouldn't be standing here in a queue.
—Where ________ Mary have put the empty bottles?—She ________ them away. They must be somewhere.
Some young people these days just ________ go out of their homes to contact the real world.
—Who ________ be phoning us at this time of night?—It might be your sister.
—John looks a bit upset. Did you tell him the bad news?—Yes, but I ________ him after his birthday party.