There ___ a class meeting next week. Are you ready?

Did they have fun _______ the summer Palace ?—Yes. They really enjoyed themselves there.

I ______ go to bed until my father ______ back. [ ]

Is Mr. Green in the office?—No, he ________ be in the office. Look, the light in the office is off.

Why do you look so worried?—I’m expecting a call from my son. He London for three days.