求教几道语法题

Scottla

Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have been implicated in global warming.
(A) of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have
(B) of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gases having
(C) of comparable size, and also they emit far fewer carbon dioxide and other gases that have
(D) that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have
(E) that have a comparable size, as well as emitting far fewer carbon dioxide and other gases having

是选B吗？考虑到平行，可是having在这里好吗？

CrackingGMAC

选A吧。
having done 做限定性修士是肯定错的。
至于你说的as well as, 并不一定要求平行。这里的ing应该是当状语来修饰了。类似于SVO+ING结构。

hope it helps

CrackingGMAC

补充一下，这道题貌似也写得不是那么好。Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size 按照GMAT来说应该是有歧义的。应该改成Diesel engines burn as much as 30 percent less fuel than DO gasoline engines of comparable size.  哪来的题？

Scottla

但是emitting　修饰前面逻辑上是不是有问题，ing伴随不是一般用于解释原因吗