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【题目】Light bulb which was invented by Edison _________now.

A. was widely used B. is widely used

C. will be widely used D. used widely

【答案】B

【解析】句意:爱迪生发明的灯泡现在被广泛使用。考查被动语态主语Light bulb是动词use的受动者,需用被动语态,可排除D选项。now现在,用于现在时,可排除AC选项。根据句意结构,可知选B。

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