Bill， can I get you anything to drink —______.

1Your Englishteacher has never lost his temper, ___________ he?

Do you know that a 13-year-old English boy has done a nuclear experiment successfully —_______ unusual work he has done!

The lecture, _______at 7:00 pm last night, was followed by an observation of the moon with telescopes.

Do you believe what he said — No , never. It ________ be true.