the last factory--i am going to visit is the place --my mother worked five years ago.

问题描述:

the last factory--i am going to visit is the place --my mother worked five years ago.
答案是“that ,where”
想问一下“which,where”可不可以

不可以,前面有the last就一定要用that,百度以下"定语从句",里面有必须用that 的情况
只能用that作为定语从句的关系代词的情况    (a) 在there be 句型中,只用that,不用which.  (b) 在不定代词,如:anything,nothing,the one,all等作先行词时,只用that,不用which.  (c) 先行词有the only,the very,the same,the last,just修饰时,只用that.  (d) 先行词为序数词、数词、形容词*时,只用that,不能用which..  (e) 先行词既有人,又有物时.  (f) 先行词指物,在主句中作表语时.   (g) 为了避免重复.   (h)先行词是the way或the reason时,that可作关系副词,也可省略   (i) 主句的主语是疑问词who /which时