关于BY全解里面的一题:Minnesota is the only one of the contiguous forty-eighty states that still has a sizable wolf population, and where this predator remains the archenemy of cattle and sheep
(B) that still has a sizable wolf population, where (E) where there is still a sizable population of wolves and where
答案选(E),理由是the only one:where...and where 平行结构。但(B)选项中的结构也可以看成为Minnesota is the only one that...., where引导的非限定性定从。这样有什么不可以吗?句子一样简洁呀