That view represents a significant shift from the historical—which the grant of corporate privilege was to advancepublic purposes such as building roads, bridges, and canals.

以上源于一篇專八改錯(cuò)題，我覺得錯(cuò)誤點(diǎn)是在于historical后面缺一個(gè)名詞成分，但參考答案是把which改成where，請(qǐng)問各位老師，為何參考答案要如此改？

where 引導(dǎo)的定語從句修飾the historical. 假如用which, 沒辦法和前面構(gòu)成修飾關(guān)系。the historical 是定冠詞+形容詞的一種表達(dá)方法，其實(shí)等于名詞用途， 如the rich, the beautiful, the natural. 當(dāng)然假如你加個(gè)詞，只須語境允許也可以，如：the historical roles