The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
How did it _____ that the two men arrived to address the same meeting at the same time.
The authorities declared that because of the war petrol was _____ and had to be rationed (定量供应).
His name was on the _____ of my tongue, but I just couldn't recall it.
Feudal landlords, and imperialists are in no way more _____ than wolves.
She was putting on her watch when the _____ broke and it fell to the ground.