求解句子结构

Ninasunyan

the director claims that this production is as similar to the original production as is possible in a modern theater.谁能帮忙解释下这句话的语法啊

sisichen666

http://forum.chasedream.com/GMAT_CR/thread-784273-1-1.html

Ninasunyan

谢谢，可是那里面也没有对第二个is 的解释，还是不懂啊

Ninasunyan

个人理解：第二个is前面省略了this production 不过不知道对不

Ninasunyan

还有个类似的句子
Providing initial evidence that airports are a larger source of pollution than they were once believed to be, environmentalists in Chicago report that the total amount of pollutant emitted annually by vehicles at O’Hare International Airport is twice as much as that which is being emitted annually by all motor vehicles in the Chicago metropolitan area.
A. as much as that which is being emitted annually by all
B. as much annually as is emitted by the
C. as much compared to what is annually emitted by all
D. that emitted annually by all
E. that emitted annually compared to the
B选项（虽然不是正确选项）

kiwifoodtown

个人的一点见解
1句，是不同状态下的对比，是说this production 可能in a modern theater 也是与the original production 接近。是同一物体两种状态的比较。所以要有动词is 如果去掉就完全不对了。

2句，B选项结构对，但比较对象错了。逻辑意思就错了，如果代入后句的话，就变成了the total amount of pollutant emitted annually by vehicles at O’Hare International Airport is emitted by the all motor vehicles in the Chicago metropolitan area。