A left－luggage office is a place where bags ________ be left for a short time，especially at a railway station.

— Who’s singing in the next room?— It ____ be her . She has gone to New York.

It is usually warm in my hometown in March, but it _____ be rather cold sometimes.

—Shall I tell you about it?      —No, you _______. Sandy has told me already.

 Whose T-shirt is this?     It________ be John’s.  It’s ________ small for him.