–Hi, Tom. Any idea where Jane is? --She _______ in the classroom. I saw her there just now. 

Sometimes the boy is a bad-tempered child, but he ____ be quite lovely when he wishes．

The art exhibition is really worth _______，and you’re sure to learn lot from it. 

He went into his room,    the light and began to work.

— There’s somebody at the door. Who ______ it be? Is it the postman ?—No, it ______ be him. It’s just seven o’clock. It’s too early.