GWD27-7

Providing initial evidence that airport 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

答案是D，可怎么看也不觉得D像对的。哪位NN能指点一下啊？

你看象哪个？

我也觉得D挺怪的，选的B，但觉得B也不太象。如果D是对的，那看来就不能迷信每次都选 n times as ... as...  那B应该怎么改呢？是不是"much anually"用错了？

请指点

这道题好像和下面的这个GWD-4-Q4有点类似GWD-4-Q4GWD-13-Q8

A new hair-growing drug is being sold for three times the price, per milligram, as the drug’s maker charges for another product with the same active ingredient.

1. as
2. than
3. that
4. of what
5. at which

倍数后面加that,表示"是...的多少倍", 然后从简洁的角度讲,D是最短的.

open to discuss.

what不可以省略吗？

同问~~~~~~~~~~

偶觉得B应该是annually副词位置错误~~~，WHAT应该是可以省略吧

至于D，不确定，没见过这种用法，没敢选~~

选D很好。

首先，what不能省略。比较中一定要能找出相应的比较对象。同意rainnyxl的解释。但B还错在把副词annually放在as much as 中间。as adj. as 或 as adv. as  

其次，整句中还有前后对称的地方

that the total amount of pollutant emitted annually by vehicles at O’Hare International Airport is twice
                that
                emitted annually by all motor vehicles in the Chicago metropolitan area

that指代the total amount of pollutant

最后，twice/triple都可以当动词用，有很多例子

eg. Microsoft Corp.'s new Office 2007 software produced almost twice the revenue of the previous version  

but twice is not a verb here due to the is before it.