定语从句疑问?

题目

定语从句疑问?
Do you still remember the chicken farm ___ we visited three months ago?
A.where B.when C.that D.what 答案选that
We will be shown around the city,schools,museums,and some other places,___ other visitors seldom go.
A.what B.which C.where D.when 答案选where
这两个定语从句有什么区别?如果说第一句中因为后面从句we visited缺宾语,所以定语从句的引导词不能是副词where而应该是代词that,那为什么第二句后面从句other visitors seldom go同样也缺宾语,可答案又能选where了呢?

答案