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Edison began experimenting with something which he had made himself.A.On August

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Edison began experimenting with something which he had made himself.A.On August

________ Edison began experimenting with something which he had made himself.

A.On August 12,1899

B.In August 12,1899

C.On 12 August, 1899

D.In 1899, August 12

试题答案

A