Alice,what were you doing when the fire started

Alice,what were you doing when the fire started What were you doing when the fire happened? — What were you doing when the fire What were you doing when it started raining What were you doing when the fire broke out 单选 what were you doing when you (hear) the news what were you doing when the UFO arrived? What were you doing when the bell r_____? what were you doing when the ufo arrived 作文 unit 3 what were you doing when the ufo arrived? What were you doing when the teacher _______ what were you doing when the teacher _____the classroom