刘振民E11-29

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（A）

(E) as to be impractical of study

答案是A,请问各位一下, 为什么B 不行呢 ?

我想應該是it不對吧

前面有兩個名詞 所以不清楚他是指哪一個

A的話就沒有這個問題了

請NN指教^^

B改变句意了；原句说不实用；b说不是不实用；

that way 好像是不能这么用，that 很少用来指代一句话