—Look! The man at the gate _______be our headmaster. He is always standing there every morning.—No, it_______ be him. He is holding a meeting in the office now.
______it is to jump into the river to swim in summer!
Look! ____.
The workers were making so much noise in the workshop, and the boss hurriedly went to see ____.
I don’t believe everything goes well with you, ____?
You’ve just missed your ______, and you will have to wait for the next round.