Thomas Alva Edison was the most famous of all American inventors and______electr

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问题 Thomas Alva Edison was the most famous of all American inventors and______electric lamp, phonograph, motion pictures and parallel circuit.

选项 A、invented
B、inventing
C、has invented
D、had invented

答案 C

解析句意：托马斯-埃尔瓦-爱迪生是美国最著名的发明家，他的重要发明包括：白炽灯、留声机、电影、并联电路等。此处表示过去某个时间里发生的动作或状态，为一般过去时。

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AlthoughFrench,German,AmericanandBritishpioneershaveallbeencredite