题目内容
________ about this computer program, a huge amount of time and energy would have been saved.( )
A. Had I known B. If I knew C. If I should know D. Would I know
A
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题目内容
________ about this computer program, a huge amount of time and energy would have been saved.( )
A. Had I known B. If I knew C. If I should know D. Would I know
A