--- I saw the Smiths at West Beijing Station this afternoon.--- You __________. They are still on holiday in Hawaii.

The man over there _________ be over fifty. He looks so young.

- 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 the woman in red ? Is it Mrs. White?---It          be her. She went to Beijing yesterday.

----Whose is that book? ----It _________ belong to Lucy. Her name is on it.