问 be on vacation go on vacation do for vacation take a vacation go for vacation等有什么区别,顺便问:What are you doing for vacation?与What are you doing on vacation?有何区别?
问题描述:
问 be on vacation go on vacation do for vacation take a vacation go for vacation等有什么区别,
顺便问:What are you doing for vacation?与What are you doing on vacation?有何区别?
答