"The USA is a large country in which many different dialects are spoken."为什么用in which
问题描述：
"The USA is a large country in which many different dialects are spoken."为什么用in which
答
这是定语从句,先行词是a large country,在定语从句中in the country 做地点状语,如果把定语从句换成单独的句子,则为Many different dialects are spoken in the country.所以用in which=where