what are you doing for vacation?可以用On替换for吗

what are you doing for vacation?可以用On替换for吗 what are you doing for vacation?为什么要用for不用on what are you doing for vacation .为什么用介词for 而不用on? what did you do on vacation和what are you doing for vacation有 what are you doing for vacation What are you doing for vacation? What are you going for vacation?和Where are you doing on vaca what are you doing for vacation?与 when are you going on vaca 英语周报unit 3.what are you doing for vacation? What are you doing for vacation怎么缩写? What are you doing for vacation的作文 what are you doing for vacation各做什么成分?