It is usually warm in Nanjing in spring. But sometimes it        be very cold.

________did Gina say when you told her about the game?

–Look at that red bike, it _____ belong to you. I have seen you ride it. --But it ____ be mine. Mine is broken. I am having it repaired. 

What do you mean, there are only ten tickets? There _________ be twelve. 

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