---- Daddy ,can you buy me a new MP3 when you go to Beijing?-----You ____ get one if you are admitted to a key middle school.

---Whose is the pencil box?---It _____ be Tom’s. Look at his name on the cover!

—Look! That man looks like Mr．Brown．—It ________ be him, for I know he is at home．

—Must I do my homework now, Mum?—_______. You can do it tomorrow.

A traffic regulation released in a foreign country states that passengers sharing a car with a drunken driver _____ be punished together with the driver himself.