金宝手游:高考英语????

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1. Without electricity human life __________ quite difficult today. (MET9138)

A. is B. will be C. would have been D. would be

2.But for the electricity,the whole world ______ so rapidly.

a. did not develop
b. would not have developed
c.has not developed
d. had not developde

书上答案 第一题是d
第二题是b

我想问的是,两道题有什么不同。为什么这么选。请说明白点,Thank you very much!

第一题中human life would be quite difficult today,应为有“today”表示对现在的虚拟,所以用“would be”
第二题意思是“如果没有点,整个世界不可能发展的那么迅速。”对这句话来说,“世界发展迅速”是过去的事,表示对过去的虚拟,所以用“would not have developed ”