英语翻译当UFO到达时，你正在做什么我正在图书馆前面当UFO到达时，他正在做什么，当它到达时，他睡过头了。一定要用初二的

一.what were you doing when the UFO arrived 二.I was standing in front of the library 三.what was he doing when the UFO arrived 四 he was sleeping late when it arrived ( ^ _ ^ )