—How is your grandma?—She’s fine. She used to_____ TV at home after supper. But now she is used to ____out for a walk.
—What class are you in? —I’m ____.
—Who’s that, Kangkang? —____ Mary.
—____ is Mary? —She is five.
—Are they from Canada? —No, they ____.
—____, are you Mr. Wang? —Yes, I am.