“No student,” the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission.”

--Who’s singing in the next room? Is it Lucy?---It       be her. She has gone to New York.

A: ________ I go to the airport to see Uncle David off tomorrow morning, mum? B: No, you needn’t. You may join us if you want to.  

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

 -- Is it your brother playing football outside? -- It ________ be him. He is helping mother with dishes now.