Sometime is knocking at the door. Who ______ it be? --It ______ be Tom. He is still in the school.
I’m afraid there _______ a snow tomorrow.
—I had a bad cold. I think you’d better ________ to see a doctor.
—How soon will you finish your homework?—________ an hour.
The reporter said that the UFO ________ from north to south when he saw it.
Hurry up, everyone ________ for you.