英訳に間違いが有れば正してください。
そのスタジアムは当初の設計とまるっきり違う。
The stadium is quite radically different from which was originally designed.
ヒント
from, was
答え whichをwhatにする
The stadium is quite radically different from what was originally designed.
The stadium is quite radically different from the stadium
the stadium was originally designed
fromの目的語とwasの主語を兼ねるのは先行詞を含む関係代名詞のwhatになる。
whichの場合wasの主語だけの働きなら出来る。
The stadium is quite radically different from it which was originally designed.
