My brother ____ his arm while he was playing football.
- A. broke(correct answer)
- B. was breaking
- C. breaks
- D. breaked
Why: Playing football is the long action. Breaking an arm happened in the middle of it: past simple. Break is irregular: broke.
A212 questions · Elementary · Tenses and Time
Was cooking or cooked? Practise telling a story in the past: the long action, the short one that cuts in, two things at once, one thing after another, and when or while. Answers and short explanations included.

1.My brother ____ his arm while he was playing football.
Why: Playing football is the long action. Breaking an arm happened in the middle of it: past simple. Break is irregular: broke.
2.They ____ TV when I got home, so they didn't hear me.
Why: They were in the middle of watching when I got home. Use were with they.
3.Lan ____ her coat, paid for the coffee and left the café.
Why: Three actions, one after another: all past simple. Put does not change in the past.
How to choose between the past simple and the past continuous: an action cut short, two actions at once, a sequence of events, and when vs. while.