关键是看从句中的动词.如果是及物动词(就是必须直接跟宾语的动词),则表明从句缺宾语,修饰人用who/whom,修饰物用that/which; 如动词是不及物动词(就是不需要直接跟宾语的或要接宾语时前面必须要加介词的,即用介宾的动词),则说明从句不缺宾语,可能是状语(或介宾).表地点用where.时间用when. 举例:1.This is the factory_________we visited yesterday. 2.This is the stable__________Jesus Chirst was born. 1:从句的动词是visit,我们说参观某个地方说:visit some place.而不说visit in the place所以visit是及物动词.所以缺宾语,修饰物故用which. 2,我们说出生于某地用be born in,如:I was born in beijing 而不说I was born beijing. 故说明born 后不直接跟宾语,应用介宾,或关系副词(where/when)所以此处填 in which 也是正确的.