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Eight hours ________ really a very long time．

A．are                  B．is               C．has               D．were

Eight hours ________ really a very long time．

A．are                 B．is                    C．has                 D．were

--I don't think it's good to drive eight hours without a rest．

--I agree．Eight hours _______ really a very long time．

A．has               B．is            C．are