It was Thomas Alva Edison who______the electric lamp.

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问题 It was Thomas Alva Edison who______the electric lamp.

选项 A、discovered
B、invented
C、innovated
D、found

答案B

解析此题为常识性问题。题干大意是“爱迪生发明了电灯”，句子采用了强调句型。选项中invent词意是发明。

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英语

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