请教一个英语语法问题,请求解答

Question

Barry hid himself behind the door,from____(where,which)he could hear the steps of his fathers clearly.
这题正确答案是where,为什么,请问这是什么从句,是定语从句吗?

Answer 1

是定语从句。
定语从句未必修饰一个名词，可能修饰的是一个成分，或者是一个句子。这里，定语从句修饰的是一个成分---behind the door。那么关系副词where 也指代这个成分，指代behind the door。从那个地方，可以看到。。。
定语从句修饰整个句子的例子：
As I soon learnt ，he was English himself。
as 指代后面一句话，这也是定语从句

Answer 2

该句是一个地点状语从句
定语从句和状语从句的最明显的区别是：看从句的句子结构是否完整，即是是否缺主语或宾语。当句中缺时，表明其是一个定语从句，并且也一定可以在句中找到其先行词。反之，是状语从句。
在从句中，主语是he，有了；the steps是宾语，也没缺。故句子是完整的,所以是一个状语从句
其实，通常句中若有介词+引导词时就是充当了状语，所以，从这一点很容易就可以看出其是一个状语从句。

Answer 3

不知lz是做的哪本参考书，建议以后别用这本书了。答案有误，此处应该填which,因为前面有from.逗号后面是一个非限定性定语从句，修饰the door.定语从句的引导词如果前面有介词，则指人用“介词+whom+定语从句的剩余部分”，指物只可用“介词+which+定语从句的剩余部分”。此句正确的表达其实有3种，分别是：
1.Barry hid himself behind the door,from which he could hear the
steps of his fathers clearly.
2.Barry hid himself behind the door, which he could hear the steps
of his fathers clearly from. ( 关系词前的介词也可以放到句尾 ）
3.Barry hid himself behind the door,where he could hear the steps
of his fathers clearly. ( 此处：where = 相应的介词 + which）

注意：当定语从句修饰的词是表地点的词时，后面的定语从句用where引导。
where也可用“介词+which”来替代。如：
This is the house where he has lived.
= This is the house which he has lived in.
= This is the house in which he has lived .

Answer 4

这个是状语从句
Where =the place that

Answer 5

这种题完全可以凭语感，题中有behindthe door.是从where某个地方可以听见，若选which,成了whichbehind the door不通。非正规解法，小弟只凭自己的经验，望有益