You _____ read a book in the sun—it'll do harm to your eyes．                      

Michael       be a policeman, for he is much too short．

Oh, I’m not feeling well in the stomach. I _________ so much mushroom this morning.

—Can I pay the bill by check? —Sorry, sir．But it is the management rules of our hotel that payment ____ be made in cash．

--Who’s singing in the next room? Is it Lucy?---It       be her. She has gone to New York.