问题
单项选择题
Without electronic computers, much of today’s advanced technology______achieveD．
A．will not have been
B．have not been
C．would not have been
D．had not been
答案
参考答案：C
解析：此句为虚拟句，前部分为隐蔽式条件句，可还原为If there had not been electronic computers, much of today (s advanced technology would not have been achieved).