885-3-20 提问

JoshwuS

20.    Wind resistance created by opening windows while driving results in a fuel penalty as great or greater than is incurred by using air conditioning.
(A) as great or greater than is incurred by using air conditioning
(B) that is as great or greater than is incurred using air conditioning
(C) as great as or greater than that of using air conditioning
(D) at least as great as air conditioning’s
(E) at least as great as that incurred by using air conditioning

答案是E，我觉得C也很对啊。 as great as or greater than 为什么C不对呢？
还有that指代了penalty, 前文提到的东西不是要用it指代吗？

JoshwuS

是说of后面只能接名词 不能接动词吗   
可是by也是介词，就可以接ing啊   能不能说的具体点~

shaoyipeng

Wind resistance

onedayling

C里面that指代的是什么呢？

卮言浅夏

that of using不对