的时候， 铃声已经响过了。_____ _____ _____ I got back to school, the bell ______ _______.3）我到达公共汽车站之前， 汽车已经离开了。Before I _____ _____ the bus stop, the bus ______ _______ _______.4）我决定先买一杯咖啡，然后再准备去办公室，I ______ ______ ______ go up to my office when I decided to get a coffee first.5）就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。As I ______ _______ ______ ______ with the other office workers, I ______ _____ _____ ______. Keys: 1. had left 2. By the time , had rung 3. got to, had left 4. was about to 5. was waiting in line , heard a loud sound Tr |
