单选题
Without computers, we ______ the tremendous medical advancement in the last few decades.
A、
would not make
B、
will not have made
C、
could not make
D、
couldn't have made
【正确答案】
D
【答案解析】
[注释] without作“如果没有”解，表示一种与事实相反的假设，意思上相当于一个if引导的虚拟条件句。根据题中可看出without computer 是与过去事实相反的假设，因此主句应该用：would(should，could，might)+动词的完成式。
提交答案
关闭