As we all know, Columbus _____ America and Edison _______light bulbs.A．discovere_刷题宝

题干

As we all know, Columbus _____ America and Edison _______light bulbs.

A．discovered; discovered

B．invented; invented

C．discovered; invented

D．invented; discovered

上一题下一题 0.65难度单选题更新时间:2019-10-06 07:44:03

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