—Whose schoolbag is this?—It ___________ be Mary’s. It has her name on it.

China’s word，tuhao，which caught the attention of the dictionary’s editing team，__________ be in next year’s Oxford English Dictionary．

There is a “ No smoking “ sign here. You _________ smoke.

—Must I finish the exercise this afternoon?—Yes, you ______, but you ______ finish it now.

 I’m feeling much better now, so you           call the doctor.