[求助]GWD-27-Q7

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

我选的B，答案给的是D，但是仍旧不太明白，这题考点和解题还麻烦NN们指点！谢谢！

副词不能随便调动的，因为容易产生修饰不明之嫌。再说annuually 不是修饰much的。