Without computers,we---____ the tremendous medical advanceme

Without computers,we---____ the tremendous medical advancement in the last few
A．would not make B．will not have made
C．could not make D.couldn’t have made

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D.
本句为虚拟语气,而且是对过去的虚拟,所以主句用would／could have done的形式,否定形式是在助动词后加not.本句译为：如果没有电脑,我们不可以在过去的几…里取得这么大的医学进步.

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