Without electronic computers, 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

Without electronic computers ,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

Without electronic computers, much of today’s advanced technology ________．

1. A.
   will not have been achieved
2. B.
   have not been achieved
3. C.
   would not have been achieved
4. D.
   had not been achieved

Without electronic computers, 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