The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
Neither of them thought highly of him and they both tried to _____ him in his work.
One _____ needed when making a cake is flour; another is sugar.
The _____ of the trees in the water was very clear.
The thief _____ the papers all over the room while he was searching.
The shop-assistant was straight with his customers. If an article was of _____ quality, he'd tell them so.