i want to go back to the factory ____ i worked last year.为什么用where ,不用which?i will never forget the mountain village ____ we visited last year.这里用which.和上面那句很相似，也没有In，at,要怎么看

i want to go back. i want to go back to you I Want to Go Back 歌词 I really want to go back to home. I also want to go back to the 再见中国!I want to go back to Palestine I want to go back No matter I never give I want to go I want to go to I want to go to I want to go back to ShangDong 我要回山东I want to go back to ShangDong我要回山东这句话说的对吗? What is dear to you to go back to my side.I want 补充全面点. i want back还是i want to back不太懂请指教 I want to go home 这句话对吗?welcome to back home 为什么不对？ 翻译I want to go back to the past,Don't try so cool~ but I didn't want to go back to my other problems either I want you back,want you back in to my i want to go be