题目内容：

一句英语语法题,不难!
If you are traveling _____the custom are really foreign to your own,please do as the Romans do.
A in which B where
为什么选B不选A?
平时做题怎样分清这2个词?一直搞不懂!

优质解答

首先看前一部分,you are traveling后面应该加一个状语,也就是in some place,而后一部分也应该加一个状语,而where可以做状语.看似in which也是可以的,但是which应该在主句中是做定语,它可以指village,country等,但这...