1 . The boy felt sorry because he ________ (break) his father’s cup.

2 . 贵阳的山水如此绚丽，他立即便爱上了这座城市。
The mountains and rivers in Guiyang were so colorful that he ________ ________ ________ ________ the city at once.

3 . When the bell ________ (ring), my dog rushed to open the door.