这里先行词在定语从句中做主语,因此用 关系代词which
如果做状语,用关系副词where
可以把先行词带入从句中,直接能用的,用which,还需要加介词的,用介词+which 或where
你这句话就是 [the place] interested me most 做主语
如果是The place_____ I want to go most is Tibet.这句话把place代入从句就是 I want to go 【to the place】most , 那么关系代词用 to which 或where
有问题欢迎追问.