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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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A：wings, shaped so smoothly and perfectly。shaped so smoothly and perfectly没有说明是修饰 wings 还是 airplanes。shaped smoothly被包含于shaped perfectly，语义重复，应该换成 smooth.
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