地点状语从句,where 是 in a cave
从句是pirates used to hide gold in a cave.
非要用which的话,The machine was used in a cave which pirates used to hide gold in.
地点状语从句,where 是 in a cave
从句是pirates used to hide gold in a cave.
非要用which的话,The machine was used in a cave which pirates used to hide gold in.