1. was reading - heard
2. came - was having
3. went - was raining
4. Were you watching - phoned
5. met - was wearing
6. broke - were playing
7. were waiting - arrived
8. wasn't driving - happened
9. fell - was painting
10. were you doing (at this time yesterday: vào đúng lúc này ngày hôm qua => QKTD)