Class regulations require _____ is the last to leave the classroom _____ off all the lights.

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

 Michael ______ be a policeman, for he is much too short.

       you be interested, I’ll tell you the whole story.

.To qualify yourself for this kind of new job, I recommend that you____some online courses.