Look! They are sitting __________ the tree.
—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.
—You won the first prize in the Physics competition. —. I made several terrible mistakes.