问题
选择题
Had I known about this computer program, a huge amount of time and energy ________. [ ]
A. would have been saved
B. had been saved
C. must be saved
D. was saved
答案
答案：A
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Had I known about this computer program, a huge amount of time and energy ________. [ ]
A. would have been saved
B. had been saved
C. must be saved
D. was saved
答案：A