Cindy-----never------London for vacation中间填什么

Is Sally going to London __ vacation this weekend.中间空格填介词.用o 括号内填什么When ()for London? Please call us when you ( )London 中间填什么? London is the of the UK.中间 填什么 please( ) for our environment中间填什么? They flew to London for their vacation yesterdsy afternon.(改 听对话，回答问题。 1. What is Cindy doing for vacation? A. Going camp The sweater is()()samll for me中间填什么 B--- the way,where did you go for your vacation?横线应填什么 He is leaving for London for his vacation.He is____ ___Londo for vacation什么意思,和on vacation有什么不同 on vacation 和for vacation有什么区别?