一道语法题

qbfnigel

 Unlike a hurricane, which can be observed from within, a tornado is so small that such a study has not been practical.
(A) that such a study has not been practical
(B) that studying it that way has not been impractical
(C) for such studies as this to have been impractical
(D) as to not make such a study practical
(E) as to be impractical of study

  答案是A，我觉得E貌似比A还简洁，不知道E错在那里？ 望NN指教

飞不高

以下是引用qbfnigel在2009-5-22 11:48:00的发言：

 Unlike a hurricane, which can be observed from within, a tornado is so small that such a study has not been practical.
(A) that such a study has not been practical
(B) that studying it that way has not been impractical
(C) for such studies as this to have been impractical
(D) as to not make such a study practical
(E) as to be impractical of study

  答案是A，我觉得E貌似比A还简洁，不知道E错在那里？ 望NN指教

e, the logical subject of "impratical" is tornado. Well, logically, is tornado impratical or is study impratical?

another point, i can't understand the structure "impractical of study"

open to discuss

qbfnigel

谢谢 您的回答