这里为什么要选where呢?可以用at which 吗?

B 定语从句 where是修饰那个树立着有名的城市的地方 不能用at which 修饰地点时只能用where

B

游客要求向导在那个有名的塔下给他照张象。
这里where引导地点状语从句，表示在什么地方：Where I was born ,there was a river.在我出生的地方有条河.Where there is a will, there is a way.有志着，事竟成。（在有意志的地方，有一条路）
如果用which引导定语从句则应为：the visitor asked the guide to take his picture at the place at which stands the famous tower.因为which引导定语从句应该修饰一个名词，