— What does the notice on the wall say? — “No person _____ take books out of the reading room; otherwise he _____ be fined.”

 He insisted the person referred ______ put into prison at once.

If you had got up early, you_____ the early bus.

I wish that you _____ such a bad headache because I’m sure that you would have enjoyed the concert.

一Professor Li, ______the student start at once or wait a while?     一At once.