根据所给汉语提示完成句子
1.What were you doing when you _________ _________ (听说) the accident?
2. My plane to Shanghai will _________ _________ (起飞) in an hour.
3. _________ _________(并非所有的) girls are afraid of snakes.
4. Our city has been famous _________ _________ (在历史上).
5. The old man _________ _________ (被杀)in a terrible accident.