用 where 还是 which?

定语从句连词用which,还是用where 定语从句中的关系词用where还是which? 怎样判断定语从句是用which还是用when,用which还是用where? in which 前面可以加逗号么?这句话用in which还是where好? where等于what place,还是which place where还是which 定语从句还是状语从句? i work in a company ( ) sell cars,定语从句,用where还是which, this is the hotel ___i stayed last year,用where 还是 which. 我还记得我们初次见面的一天.英语翻译这句话,是用which还是where? could you tell me( )l can buy amap of china用where还是which 怎么判断英语句中该用 whose where 还是 which this is the park——I visited yesterday 中间用which 还是 where