定语从句关系词的用法

定语从句关系词的用法
where,white ,as 在定语从句中作关联词的用法（先行词是什么时用where,white ,as）
还有几个题目：
1.Is this the factory ( ) a lot of student visited yesterday
A.the one B.which C.who D.whom
2.Is this factory ( ) a lot of student visited yesterday
A.the one B.that C.which D./
（这两题就是多了一个the 有什么不同吗?）
3.October1,1949 was the day ( ）the People's * was founed .
A.which B.when C.where D.in which
4.October1,1949 is the day ( ) we'll never forget.
A.when B.that C.where D.in which
5.Do you still remember the day ( )we first met?
(怎样区分the day 作宾语还是时间状语?看从句的动词是及物动词还是不及物动词嘛?那4题中forget和5题中met不是既是vi.也是vt.）
6.Is this the house ( ) Sheckespare was born
A.at which B.which C.at where D.in which
(which作关系词的用法）
7.She is no longer the student ( )she used to be .
A.who B.whom C.which D.that
8.Whose is this book the cover ( )is blue
A.whose B.its C.which D.of which
9.The girl handed everything ( ）she had picked up in the street to the police.
A.which B.in which C.that D.all
请回答以上几题,最好有讲解,