“Passengers _____ not have their breakfast on the light train”. This rule arouses heated debates in Chongqing.

According to his will, his money ____be used to build a school instead of a market.

—Look at that girl! Is it Susan?—No, it _______ be her. She has gone back to her hometown.

---I don’t want to go to school on foot. What should I do? ---You          try asking your father for a bike, or you can go by bus.

—Look at the picture on the wall. It ________be David’s.—Yes, his name is on the first page.