—What’s the best movie theater to go to?—New China. Because _______. I can walk there.
---Must I tell Mike about it?---No, you _______. He’s already been told.
We brush our teeth twice a day.
My mother is ill. I ______ stay at home to take care of her.
—Is Mr. Smith over there?—It ________ be him. He has gone to Beijing on business.
After a long walk, the old man be tired now.