Without electronic computers much of today’sadvanced technology.A. will not have been ach

问题补充：

Without electronic computers，much of today’sadvanced technology.

A. will not have been achieved

B. have not been achieved

C. would not have been achieved

D. had not been achieved

答案：

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。