问题描述：
怎么区别where引导的状语从句 定语从句?
have you been to the island where there is a mountain
please put all these books where they used to be这为什么是状语从句啊?
have you been to the island where there is a mountain
please put all these books where they used to be这为什么是状语从句啊?
问题解答：
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