✨ 最佳解答 ✨
因為contests後面的一整串是來形容它的,students must design and build a spaghetti bridge "in contests",需要in 這個介系詞,所以that which 都不行,不然……contests that (which) students must design and build a spaghetti bridge 還原成就會變成 students must design and build a spaghetti bridge "contests"
天呀!!!
還是謝謝你 不過英文沒救了
考完了沒救了 爆炸了