大全 745，651，

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

(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（B）

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

请问 ，C 是不是错在 that are 应该省略 ，和 SO 即可能单独修饰smooth 和又可以同时修饰 smooth and perfect 的位置有歧义啊？按道理 改用perfctly,可是为什么它又用的smooth 而不是 smoothly 啊？

745       The expected rise in the price of oil could be a serious impact to industrialized nations and severely diminish the possibility to have an economy free of inflation.

(A) be a serious impact to industrialized nations and severely diminish the possibility to have

(B) seriously impact on industrialized nations and severely impede the possibility to have

(C) seriously impact on industrialized nations and severely impede the possibility of having

(D) have a serious impact on industrialized nations and severely impede the possibility to have（E）

(E) have a serious impact on industrialized nations and severely diminish the

possibility of having

B是错在将diminish 改成impede 吗 ？用 impact on 不是比名词更简洁吗？不是应该是 possibility to do 吗？怎么变成 possiblity of doing 了？这个用法也对吗？

谢谢！！！

没人帮忙啊，呜呜呜

impact n.    impact on ... wrong

impede the possiblily  冗长

谢谢joell! the possibility of doing 对吗？我觉得好像是to do 吧！

第一题我还是不太明白，请你多加指点了，万分感谢。。。

(C) wings that are shaped so smooth and perfect

B中smooth 修饰的是wing,而perfectly修饰的是 shaped

C中smooth ,perfect修饰的都是动词shaped，应加 ly变副词形式

Impact: To retard or obstruct the progress of.  妨碍拖延或阻挡…的进程

Diminish: To make smaller or less or to cause to appear so.  减少使减少或使似变少

跟possibility的话还是后者比较适合吧。我是这样排除B/C/D三项的。也请大虾指教。

我也不明白为什么651选B,请NN指教!谢谢!