[求助]OG11对85和96题矛盾！

OG11-85

Dirt roads may evoke the bucolic simplicity of another century, but financially strained townships point out that dirt roads cost twice as much as maintaining paved roads.

(B)  dirt roads cost twice as much to maintain as paved roads do 正确答案

OG11-96

Ranked as one of the most important of Europe's young playwrights, Franz Xaver Kroetz has written 40 plays; his works-translated into more than 30 languages-are produced more often than any contemporary German dramatist.

(D) than those of any other 正确答案

对于答案本身没什么问题，主要是觉得OG在这两道题上不一致，85题比较的是两种roads的花费，所以用了paved roads do, 但96题dramatist 后面为什么没有加上are呢？比较的不是两个人的作品出版吗？现在发现有点不明白as...as 比较的用法了。。。

OG11-85 (B)里面的DO是可以省略的.同理OG11-96后面可以加上ARE.
就象YOU ARE TALLER THAN I = YOU ARE TALLER THAN I AM.

本人也是长期对这个考点没有信心，错的时候很多。今天总结了一下，发现如果不引起歧义话，正如楼上所说，但如果有歧义就不能省略了。