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题库 / GMATAdvanced-SC-12
Since the 1930s 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.
wings, shaped so smoothly and perfectly
wings, wings so smooth and so perfectly shaped
wings that are shaped so smooth and perfect
wings, shaped in such a smooth and perfect manner
wings, wings having been shaped smoothly and perfectly so
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smooth可以做一个副词
再者xx shaped和shaped XX这里都是修饰shaped的，都要用副词，没有说前面副词后面就是其他形式的
AD错误在于这个想用同位语修饰wings属性，但是只有分词修饰，那应该是修饰主句主语的，所以一定要有一个wings
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