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Almost all metals are good conductors, silver the best conductor of all.A. been

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Almost all metals are good conductors, silver the best conductor of all.A. been

Almost all metals are good conductors(导体), silver _______ the best conductor of all.

A. been  B. being  C. is  D. to be

 

试题答案

B

这题考查独立主格的用法。几乎所有金属都是良好的导体,银就是所有金属中最好的导体。”后半句独立主格中的主语是silver,它和谓语动词be的关系当然是主动,同时既不表将来,也不表过去的。因此应该选B.