Things are getting even worse now without Jackson.—It’s certain that he will ________ at the basketball court.

What does the sign over there read—“No person __________ smoke or carry a lighted cigarette，cigar or pipe in this area.”

People come into your life for a reason, a season or a lifetime. When you _______ which one it is, you will know what to do for each person.

We must try our best to stop pollution ______a low-carbon(低碳)life.

He _______ Alice for ten years.