One of the most scenic areas is the Loire Valley,where you can visit the old castles in which the kings and queens of Fr

the old castles in which the kings and queens of France used to live.是定语从句,而LIVE是不及物动词,住在某地是live in +地点,IN WHICH = WHERE能不能更详细一点..我不是听的很明白..住在某地是live in+地点的话可不可以是where you can visit the old castles which the kings and queens of France used to live in?in which=where是固定的吗?不论在什么情况下都成立的?castles是先行词，是国王与王后曾经住过的地方，故引导词用WHERE ‘副词’，但如果用WHICH‘代词’时就要加IN ，因为LIVE 是不及物动词，就象刚开始说的住在某地是live in +地点。没错，在定语从句中，in which=where是固定的希望这次你能明白。