题目内容

________ 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

答案：A

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________ 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

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

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