.Susan’s parents have bought a large house with a swimming pool. It ______be very expensive.

There are months in a year. month is December.

Look! The light is still on. Is Mr Wu working in his office？—No, it _____ be Mr Wu. He has gone to Nanjing for a meeting.

Jimmy felt terribly sorry because he took his deskmate’s math book away__________[ ]

______ does this scarf belong to?— Let me see. Oh, it may be ______.