来问一道prep12-55题的题。知道了错误的原因，但是不理解正确的句子

Though widely used for decades to fuel home heating systems, utility boilers, and industrial furnaces, natural gas has still accountedfor far less of the energy consumed in the United States than has oil.

(A)   natural gas has still accountedfor far less of the energy consumed in the United States than has oil

(B)   natural gas has still accountedfor far less of the energy consumed in the United States as oil

(C)   natural gas still has accountedfor far less of the energy consumed in the United States as oil has

(D)   still far less of the energyconsumed in the United States has been accounted for by natural gas as by oil

(E)    still far less of the energyconsumed in the United States has been accounted for by natural gas than hasoil

这道题正确答案是A。

楼主错选了C。

B&C的错误原因是 less和as不能搭配。

但是对于选项A的【than has oil】我不是很理解它这个的比较结构。我自己觉得是【than oil has】，也是因为这个原因把A排除的 TT TT

求助~>< 在manhattan，beat gmat还有BD搜到的都没有对A的解释