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【题目】—When ________ the first practical light bulb ________?

—In 1879.

A.does; inventB.is; inventedC.did; inventD.was; invented

【答案】D

【解析】

句意:——第一款实用的电灯泡什么时候发明的?——1879年。

考查一般过去时的被动语态。A选项是一般现在时;B选项是一般现在时的被动语态;C选项是一般过去时;D选项是一般过去时的被动语态。根据回答“In 1879.”可知问句是询问过去的事情,用一般过去时,排除AB;“电灯泡”与发明之间是被动关系,因此用一般过去时的被动语态。故选D

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