[求助]请教一道语法题(XDF蓝皮书P311第88题)

Since the 1930's aircraft manufactures have tried to build airplanes with frictionless wings, shaped so smoothly and perfectly that the air passing over them would not become tunbulent.

A) wings, shaped so smoothly and perfectly

B) wings, wings so smooth and so perfectly shaped

C) wings that are shaped so smooth and perfect

D) wings, shaped in such a smooth and perfect manner

E) wings, wings having been shaped smoothly and perfectly so

答案是B,为什么呢?

 shaped so smoothly and perfectly

smooth 不能修饰shaped,而perfectly 可以修饰shaped 所以可以排除ACDE

谢谢楼上两位MM.

I think I got it!