The lady in the sitting room           be over sixty. She looks so young.

—Guess what; Yang Yang failed in the maths test .—How         it be？She is second to none in maths.

_____ you pass me the plate on the table?

— I think the man over there must be Bob.— It _______ be him. He has gone to England.

--- Do you have _________ paper, Millie ? I want to write a letter.--- Sorry, I don’t have          .