I spend about two hours __________ my homework at home every day.
You ______ be polite to the old man.
--- Tom, where is your father? --- I’m not sure.He_______ in his office.
This Japanese dictionary Ellen’s. She is only person learning Japanese in our class.
--- Whose backpack is this? --- It be Mary’s. She is looking for hers.
Mr. White is fixing his computer because there is __________ wrong with it.