wait till/until ... idiom
等到…吧（表示对看到某人对某些特别或不寻常之事的反应感到兴奋）
said when you are excited about seeing another person's reaction to something special or unusual
Wait till you see what Rachel's wearing! 看看雷切尔的穿着你会大吃一惊的！
Wait till he hears the news. 等着看他听到这条消息后会有什么反应吧。