During the tourist season, there are many people wandering in this city to see the old castles _____ in the sixteenth century.
—What’re those over there? —Oh, Some enemies ________ now.
—I think you should say sorry to Kate, Mary. —__________, but it is not going to be easy for me.
— I saw an old photo of you and your grandfather yesterday. — Oh, it _____ when I was at school.
The beautiful girl _________came here last Saturday is my friend.
—Bill, is the pink umbrella Ann’s? —No, it __________ be hers. Hers is purple.