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．will 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．will be saved
D．was saved
答案：A