——Do you know where David is? I couldn’t find him anywhere. ——Well, he_______ gone far—his coat’s still here.

If people eat natural plant poisons by mistake, they _______ go to hospital without delay.

Johnny’s uncle promises that the boy        get a nice present on Christmas Eve.

 .Susan’s parents have bought a large house with a swimming pool. It ______be very expensive.

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