---Very few students passed last monthly exams, ______?---Yes. They all passed because they did good preparations before the exams.
The old man fell ______ and hurt himself.
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.