Question

小金魚

形容詞子句
請問關係副詞後的子句要為完整子句，請問這一句為什麼符合呢？（因為我覺得它後面的子句感覺不是完整的
謝謝🙏

1. The factory was burned down.
I used to work in it (= the factory).
The factory which I used to work in was burned down.
→ The factory in which I used to work was burned down.
→ The factory where I used to work was burned down.
(我之前上班的那間工廠被大火燒光光了。)