My mom was cooking _____ the bell rang.
A: when
B: where
C: why
A: when
B: where
C: why
举一反三
- My mother was busy ______ when I rang back home. A: cook B: to cook C: cooking
- I ________ (watch) TV when you rang the bell the first time, and that’s why I didn’t hear you.
- ______ had I finished the test ______ the bell rang. A: Never ... then B: No sooner ... then C: Hardly ... when D: Seldom ... when
- The teacher ____ us how to do the experiment when the fire bell rang. A: was showing B: shown C: showed
- Just then, the telephone rang. It rang ______ .