Without electronic puters，much of today’s advanced technology.
A. will not have been achieved
B. have not been achieved
C. would not have been achieved
D. had not been achieved
网友回答
A. will not have been achieved
B. have not been achieved
(答案→)C. would not have been achieved
D. had not been achieved
解析：这是一个含蓄虚拟条件句，通过介词短语without,表示潜在的一种假设，而主句中的情况也早已经发生，所以是对过去情况的一种假设，因此用would not have been achieved这一形式。