【单选题】
You’d better ________ to hospital at once.
【单选题】
You’ll be late, ______ you start at once.
【单选题】
You had better [填空] in the hospital.
【单选题】
[]a friend I would advise you to stop smoking at once.
【单选题】
—Are you a teacher?—No, but I ________ once. I worked in a middle school for three years.
【单选题】
It was required that the crops [填空] harvested at once.
【单选题】
My suggestion is that Tom _____ to see a doctor at once.
【单选题】
Her wish was that he __________ at Beijing University at once.
【单选题】
The woman was innocent and the judge insisted that she______at once.
【单选题】
You’d better listening to the teacher in the lesson.