—I haven't got a mobile phone. —I think you should have . It's useful for you.
— Is John coming by train?— He should, but he ______ not. He likes driving his car.
You _____ phone him if you want to, but you _____! He will surely phone you.
My aunt _____ here by now, for she took the early bus.
The pilot kept calm in the terrible storm, otherwise the accident ______.
You _____ pay your library fines. If not, you _____ not be allowed to graduate.