题目内容
The world in the past several decades into one where knowledge is now the engine for socio-economic development.
A. transformed B. has been transformed
C. has transformed D. had been transforming
C

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题目内容
The world in the past several decades into one where knowledge is now the engine for socio-economic development.
A. transformed B. has been transformed
C. has transformed D. had been transforming
C