Had I mastered the statistic technique a large amount of time and energy.A. was avidB. h

问题补充：

Had I mastered the statistic technique, a large amount of time and, energy.

A. was avid

B. had been saved

C. will be saved

D. would have been saved

答案：

A. was avid

B. had been saved

C. will be saved

(答案→)D. would have been saved

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