what happened on "Young Lives"last night?这句中为什么要用介词on?谢谢

what happened on What happened on Dec . 25th,1928? what on earth happened?和what happened on earth?哪个对? what happened和what is going on 的区别急! what happened on Dec.25,2004?Correct the sentences.(英语翻译) What happened while Linda was on the telephone什么意思 What on earth has happened to make you so upset? What happened while Linda was on the telephone and what happened on this day that it is named? My heart goes on no matter what will be happened. 1.---Peter,what on earth do you have _______?I really don’t know what yo What had happened?What had happened?What had happened? what is happening.what happened.what has happened.what is up.what is going on .一般都用在什么场合呀. Yo yo what’s up man happened on、happened with、happened to、happened for 区别 Tom,What _ you in class?---I fell asleep.A.is happening on B.happened on C.happened to D.isTom,What_youinclass?---I fellasleep.A.is happening on B.happened on C.happened to D.is happening to 是What happened 还是what’s happened what happened=what's happened吗?