— There is somebody at the door. ________ it be Tom?

— No, it _______ be him. It’s just six o’clock. It’s too early.

— There is somebody at the door. ________ it be Tom?
— No, it _______ be him. It’s just six o’clock. It’s too early

1. A.
   May; can’t
2. B.
   Will; won’t
3. C.
   May; mustn’t
4. D.
   Must; may not

--There is somebody at the door．Who _________ it be? Is it the postman?

--No，it _________ be him．It's just seven o'clock． It's too early．

A．might；can't          B．will；won't           C．may；mustn't         D．must；mar not