We were cleaning the room when someone knocked at the door.这

What were you doing when someone knocked at the door?当有人在敲门时 what were you doing when someone knocked at the door?分析一下句型 We were having lunch,when someone knocked the door (问号处填介词或副 I () my brother when someone knocked at the door I ( ) go out when someone knocked at the door. Hardly _____ to sleep when someone knocked at the door. What___you___when someone knocked at the door? When I started ____ the big cake,someone knocked at the door we___(listen) to the radio when someone knocked at the door 英语Someone knocked at the door when l (was watching) TV When someone knocked at the door,I was having dinner.可不可以把wh I (was about to ) go out when someone knocked at the door 为什