- turbo jet
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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
(E) wings, having been shaped smoothly and perfectly so
[spoiler]OA:B[/spoiler]
(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, having been shaped smoothly and perfectly so
[spoiler]OA:B[/spoiler]
Last edited by turbo jet on Thu Jul 09, 2009 4:28 pm, edited 2 times in total.
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