—Dad, must I finish my homework today?—No, you ______. You may do it tomorrow.

—We want someone to design the new art museum for us?—          the young fellow have a try?

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

 –Are you available at 3 tomorrow afternoon? --Sorry, I ________ a meeting at that time.

No student ______ go out of school for snacks during the break without the teacher’s permission.