（浙江卷10）. Had I known about this computer program, a huge amount of time and energy __ .

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did I know I had known I knew was I known

I had known had I known did I know I knew

would have been saved had been saved must be saved was saved

If I would have known it If I had have known it Had I known it Should I known it

would have been saved had been saved will be saved was saved

If I would have known If I had have known Had I known Should I know

would help you will help you will have helped you would have helped you

I had known I have known do I know did I know

know, would have helped know, have helped knew, could have helped had known, could have helped

knew; were had known; were knew; had been had known; had been

If I would have known it If I had have known it Had I known it should I know it

I knew did I know I had known had I known

by nature in return in case by chance

had known, would not be had known; wouldn’t have been knew; would not have been had known; would never be

would have been saved had been saved will be saved was saved

would have been saved had been saved will be saved was saved

would have been saved had been saved will be saved was saved

would have been saved had been saved will be saved was saved