I was playing with my computer ____ the door bell rang. ____I was reading Harry Potter, my mum was watching Korean drama. Steven was crying ____ Mr. Li stepped into the classroom Jennifer was playing table tennis ____ Tony and I were playing basketball. Sunny was sleeping ____ a burglar broke into his room. ____ I was teaching, the students were chatting happily behind my back. ____ I was walking on the road, a bottle of acid fell from the sky.

Past Continuous Tense (When OR While)

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