Without electricity human life quite different today. A. isB. will beC. would have beenD

问题补充：

Without electricity human life quite different today.

A. is

B. will be

C. would have been

D. would be

答案：

A. is

B. will be

C. would have been

(答案→)D. would be

解析：因为介词短语without…表示与现在事实相反的情况，所以用would be。